Chemistry Sitemap - Page 19 2016-09-26

Names and Uses of 10 Gases
Gas is a state of matter with no definite shape or volume. This is a list of examples of 10 gases and their uses.

Cadmium Facts - Periodic Table
Get periodic table facts on the chemical and physical properties of the element cadmium.

Indium Facts - Periodic Table of the Elements
Get periodic table facts on the chemical and physical properties of the element indium.

Niobium or Columbium - Element Facts
Get periodic table facts on the chemical and physical properties of the element niobium or columbium.

Tantalum Facts - Periodic Table of the Elements
Get periodic table facts on the chemical and physical properties of the element tantalum.

Periodic Table of Elements - Thorium Facts
Learn more about the element thorium (Th) in the Periodic Table of Elements, including its chemical and physical properties, sources, and uses.

List of Elements Belonging to the Actinide Group
Here is a list of elements that are actinides, a subset of the rare earth elements group.

What You Need to Know about the SAT Chemistry Test
Get information about the SAT Chemistry subject test. Find out what the SAT Chemistry Test is, what the SAT Chemistry Test covers, and details about taking the test.

How To Make Dry Ice Bubbles
You can use sublimating dry ice to produce carbon dioxide gas to fill bubbles. A small piece of dry ice will produce cloudy bubbles for a long time. Here's what you do.

Recipes for Crystal Growing Solutions
Find a crystal growing recipe. This table includes recipes for preparing solutions of common crystal grown in aqueous or water solutions.

How To Prepare a Solution
These are the steps to follow to prepare a chemical solution.

How to Make Hollow Pennies
This is an easy chemistry project that uses common materials. You take a post-1982 penny, score the copper surface to expose the zinc interior, react the zinc with acid, and are left with a hollow copper penny.

Boyle's Law Calculation - Chemistry Quick Review
Boyle's Law is a special case of the Ideal Gas Law in which the pressure and volume of an ideal gas are inversely proportional to each other, providing the temperature and mass of the gas are held constant. Here's an example of how to perform a calculation using Boyle's Law.

Definition of Mass Spectroscopy in Chemistry
This is the definition of mass spectroscopy.

Relative Density Definition - Chemistry Terms Glossary
This is the definition of relative density.

Diprotic Acid Definition
This is the definition of diprotic acid.

Chemical Energy - Glossary Definition
This is the definition of chemical energy.

Chemistry Definition of Coordinate Bond
A coordinate bond is a covalent bond between two atoms where one of the atoms provides both electrons that form the bond.

Types of Chemical Reactions (With Examples)
When you mix chemicals, you may get a chemical reaction. Learn about the different types of chemical reactions and get examples of the reaction types.

Relative Uncertainty Definition and Examples
Relative uncertainty is a measure of the uncertainty of measurement compared to the size of the measurement.

Precipitation Reaction Definition
This is the definition of precipitation reaction.

What Is Polyprotic Acid?
Find out the definition of polyprotic acid, an acid commonly associated with chemistry, along with examples of polyprotic acid.

Hypothesis Definition
Get the definition of a hypothesis as used in scientific experimentation and for the scientific method.

Formal Charge Chemistry Definition
This is the definition of formal charge.

What Is a Displacement Reaction? - Definition
This is the definition of displacement reaction.

Essential Amino Acid Definition
Get the definition for an essential amino acid.

Amide - Definition and Picture in Chemistry
This is the definition of amide.

What Is the Chemical Composition of Air?
Learn about chemical composition of the Earth's air. Percentages of the most common compounds are given, according to volume.

Equilibrium Constants Practice Test
A reversible chemical process is considered in equilibrium when the rate of the forward reaction equals the rate of the reverse reaction. The ratio of these reaction rates is called the equilibrium constant. Test your knowledge about equilibrium constants and their use with this ten question equilibrium constant practice test.

Mass Percent of the Elements Test Questions
Determining the mass percent of the elements in a compound is useful to find the empirical formula and molecular formulas of the compound. This collection of ten chemistry test questions deals with calculating and using mass percent.

What Really Happens If You're Exposed to Space
What do you think really happens to your body if you're thrown out of an airlock and exposed to space, like in science fiction movies? Here's a look at the real science behind the situation and how you might even survive it.

An Introduction To Le Chatelier's Principle
Learn what Le Chatelier's Principle is and how it can be applied to predict the effect of a change in conditions on chemical equilibrium.

Galvanic or Voltaic Cell Definition
This is the definition of galvanic cell. It includes a simple schematic of how a voltaic cell works to produce electrical energy.

High School Courses Needed for a College Chemistry Degree
Find out what high school courses are needed to prepare you to pursue a chemistry degree in college.

HTML Codes for Symbols in Science and Mathematics
Here is a table of commonly used HTML codes for symbols used when creating web content for science and mathematics.

Metric Units - Derived Units With Special Names
Many metric units used in science have specialized names for the values they represent. They are considered derived units and can still be reduced to factors of the seven base units. This table lists many of these units and their corresponding base unit values.

What Is the Chemical Formula of Sugar?
This is the chemical formula for table sugar, which is sucrose.

What Is the Moon Made Of? - Chemical Composition
The Moon is not made of cheese! Here's a look at the real chemical composition of the Moon.

Chart of Common Charges of Chemical Elements
This is a chart of the most common charges for atoms of the chemical elements.

List of Copper Alloys
This is a list of copper alloys or alloys in which copper is usually the base metal.

Difference Between Hard Science and Soft Science
You may have heard the natural sciences (chemistry, physics, biology) called the hard sciences and the social sciences (history, political science) referred to

Quick Facts About the Element Beryllium
Beryllium is an element that is unfamiliar to many people, even though it is the fourth element on the periodic table. Here are some quick beryllium facts.

Antiperspirant Health Hazards
You've likely suspected antiperspirant isn't all that good for you, but do you know what exactly poses a threat to your health? Here's a look at some of the dangerous ingredients found in antiperspirants.

Melting Point Versus Freezing Point
You might be thinking the melting point and freezing point of a substance occur at the same temperature. Sometimes they do, but sometimes they don't. Here's how it works.

Chemical Properties and Physical Properties
When you study matter, you'll be expected to understand and distinguish between chemical and physical properties. Basically, physical properties are those which

Chemistry- Physical Property Versus Chemical Property
Distinguishing between physical and chemical properties may seem confusing, but it's pretty simple. Here is how you tell the difference.

What Is the Difference Between Fluorine and Fluoride?
The misspelling of fluorine and fluoride is very common, but that is not the only difference. They both have chemical properties that you should know about.

Periodic Table with Common Ionic Charges
The most-requested printable periodic table has been one for element charges, to predict compounds and chemical reactions. Here are color and black and white tables you can download or print.

Properties of Ionic and Covalent Compounds
If you know the chemical formula of a compound, you can predict whether it contains ionic bonds, covalent bonds of a mixture of bond types. Nonmetals bond to

Can You Have Negative pH? - Chemistry 101
The pH scale usually runs from 0 to 14, but you can calculate a negative pH value for 12 M strong acid. Here's how it works.

Compounds Made of Two Elements
A compound is made up of two or more elements chemically bonded together. Here is a list of examples of compounds made of two elements.

What Is the Primary Function of the Calvin Cycle?
The Calvin cycle is the final step of photosynthesis. Here is an explanation of its primary function.

How Chemical Hand Warmers Work
If your fingers are cold, you can use chemical hand warmers. There are two types of products. Here is how they work.

Why the Standard Enthalpy of Formation of O2 Equals Zero
The standard enthalpy of formation of oxygen gas is zero. Here's the reason why.

Tetrahedral Definition - Chemistry Glossary
Definition of tetrahedral, as used in chemistry, chemical engineering, molecular geometry and physics, with links to further information.

Do Mood Rings Work? - Can a Mood Ring Tell How You Feel?
Do mood rings really work? Can a mood ring tell your mood? Here's a look at how mood rings change colors and whether they can really tell your mood.

What Happens If You Mix an Acid and a Base?
Mixing an acid with a base is a common chemical reaction. Here is a look at what happens and the products resulting from the mixture.

5 Examples of Chemical Suspensions
A chemical suspension consists of particles in a fluid that can eventually separate. Here are 5 examples of suspensions.

Uncertainty - Worked Example Problem
This is a worked example problem that shows how to determine uncertainty in measurements. Uncertainty is related to precision and significant figures.

How Poisonous Is Mistletoe?
Kissing under the mistletoe is a holiday tradition. Eating it is not, because mistletoe has a reputation as being poisonous. Here's how poisonous it really is.

Holiday Chemistry Projects
There are a lot of fun and interesting chemistry projects that you can do that relate to the winter holidays. You can simulate snow, design holiday decorations, and make creative gifts. These projects use common household materials so you don't need to be a chemist to try them out.

What Is the AP Chemistry Exam?
High school students may choose to take the AP Chemistry course, which culminates in the AP Chemistry Exam. Here's a look at what the AP Chemistry Exam is and how it is graded.

Testable Hypothesis Explanation and Examples
A testable hypothesis is the cornerstone of experimental design. Here is an explanation of what a testable hypothesis is, with examples.

What Is the Difference Between Atomic Radius and Ionic Radius?
Atomic radius and ionic radius are two ways to describe the size of an atom. Here is an explanation of the difference between them.

How to Cut and Fire Polish Glass Tubing
Glass tubing is sold in a variety of lengths. There is a good chance you'll need to cut it, so here is how to cut and fire polish glass tubing.

Mercury Beating Heart Chemistry Demonstration
The Mercury Beating Heart is a popular chemistry demonstration based on an an electrochemical redox reaction that causes a blob of mercury to oscillate, resembling a beating heart. Here's how the Mercury Beating Heart works and how you can perform this chemistry demonstration yourself.

Bismuth Facts - Periodic Table of the Elements
Get periodic table facts on the chemical and physical properties of the element bismuth.

Types of Scientists
Are you curious about the different types of scientists? Here are examples of scientists and descriptions of the type of work they do.

Dryer Sheets to Detail Your Car
Did you know dryer sheets can make or break your car's finish? In some cases, they can really help you out. Mostly, however, you want to avoid putting your

The Tin Man's Toxic Metal Make-Up
The Tin Man's silver face paint was toxic!

How Damascus Steel Is Made
Have you seen a Damascus steel blade? The steel bears a pattern of light and dark watery or wavy lines. There are fake Damascus blades where a pattern is etched

Make Ammonium Nitrate from Household Chemicals
Fireworks season is coming up, so before I get into the new fireworks projects, I wanted to cover the synthesis of a common chemical used for pyrotechnics:

What Does a Comet Smell Like?
Rosetta samples of Comet 67P/Churyumov-Gerasimenko provide the facts so we now know how a comet smells. Here's a hint: It's not Chanel 5. Learn more.

October 24 Science History
Learn about the history of science by reading about the significant scientific events that took place on October 24 in history.

How Teflon Sticks to Nonstick Pans
Teflon is the name given to the fluoropolymer coating on non-stick pans. It won't stick to your food, yet somehow stays on the pan. Here's a look at how they get it to stick there.

Things that Really Glow under a Black Light
I recently wrote up a list of materials that glow under black light. Since that time, I've experimented with a black light myself. Here are items I found glowing under black light.

How To Make a Green Fire Halloween Jack-o-Lantern
A Halloween jack-o-lantern filled with green fire is much more impressive than one lit with the usual candle. Here's how to produce this easy effect yourself.

What Is a Black Light?
Have you ever wondered what a black light is? Did you know there are different types of black lights? Here's a look at what black lights are and how you can find and use a black light.

Smoke Bomb Halloween Jack-o-Lantern
Smoke bombs are cool; so are Halloween jack-o-lanterns. What do you think happens when you combine the two? You get a jack-o-lantern that belches out a ton of smoke!

Fake Blood and Guts Halloween Recipe
Mix up a batch of fake blood and guts for a haunted house, Halloween decoration, or as part of a creepy costume. This recipe is non-toxic and easy to make.

Spooky Dry Ice Fog Halloween Jack-o-Lantern
You can make spooky fog come out of your Halloween jack-o-lantern using a little dry ice. Here's how you do it plus a trick for getting the best effect.

Spiders in Space on Skylab 3
Spiders went to space as part of NASA's Skylab 3 mission. Learn about the mission and the effect microgravity had on the spiders' ability to build webs.

Fake Blood Recipes for Stage or Screen
Here are several fake blood recipes for realistic red blood, glowing alien blood, and even green, yellow, or blue fake blood.

Colloid Examples
A colloid is a type of homogeneous mixture that does not separate on its own. Here are several examples of common colloids, many from everyday life.

October 22 Science History
Learn about the history of science by reading about the significant scientific events that took place on October 22 in history.

Chemical Composition - Compounds in the Earth's Crust
This table shows the chemical composition or abundance of chemical compounds in the Earth's crust.

October 20 Science History
Learn about the history of science by reading about the significant scientific events that took place on October 20 in history.

Bleeding Knife Chemistry Trick
Here's a cool chemistry trick, perfect for Halloween! Trace a knife over your skin and leave a message that appears to be written in blood. Try it.

Candy Chemistry Projects
Candy chemistry projects are great because it's an easy-to-find material, students and kids enjoy eating leftovers, and the ingredients in candy work in several chemistry demonstrations.

List of Strong and Weak Acids
This is a list of strong and weak acids, with names, structures, and how to tell them apart.

How to Solve Word Problems
Many problems in chemistry and other sciences are presented as word problems. Word problems are as easy to solve as numerical problems once you understand how to approach them.

How to Grow Calcium Copper Acetate Hexahydrate Crystals
Grow blue tetragonal crystals of calcium copper acetate hexahydrate.

Difference Between Oxidation State and Oxidation Number
Oxidation state and oxidation number are terms often used interchangeably but mean slightly different things. Find out the difference between oxidation states and oxidation numbers.

October 15 Science History
Learn about the history of science by reading about the significant scientific events that took place on October 15 in history.

Liquid Helium Image (Element Photos)
This is a sample of liquid helium cooled to the point of superfluidity. (Element Photos). Page 198.

Gold Rope (Element Photos)
This specimen exhibits the rare rope form of gold. (Element Photos). Page 199.

Bismuth Example in Pure Form (Element Photos)
Bismuth crystal of pure element. (Element Photos). Page 22.

Californium Pure Sample (Element Photos)
Californium Pure Sample (Element Photos). Page 31.

Carbon - Fullerene Crystals - Pure Elemental Form
Carbon - Fullerene Crystals - Pure Elemental Form. Page 34.

Chlorine Gas at Room Temperature (Element Photos)
Chlorine at room temperature. (Element Photos). Page 41.

Copper Pure Reddish Element (Element Photos)
Copper is a reddish metal. (Element Photos). Page 49.

Curium Element Image (Element Photos)
Curium element image. (Element Photos). Page 53.

Einsteinium Pure Element Sample (Element Photos)
Einsteinium pure element sample. (Element Photos). Page 57.

Francium Element Photo (Element Photos)
Francium has the highest equivalent weight of any element and is the most unstable of the first 101 elements of the periodic system. (Element Photos). Page 62.

Glowing Helium in a Tube of the Pure Element
This is a glowing vial of ionized helium. (Element Photos). Page 75.

Iodine Vapor in Elemental Form (Element Photos)
This is a flask of elemental iodine vapor. (Element Photos). Page 81.

Lithium - Pure Sample (Element Photos)
Lithium pure sample. (Element Photos). Page 94.

Niobium Crystals of Isolated Element
Niobium Crystals (Element Photos). Page 111.

Plutonium Example Element (Element Photos)
Pure plutonium is silvery, but acquires a yellowish tarnish as it oxidizes. (Element Photos). Page 131.

Plutonium Ring (Element Photographs)
Ring of weapons grade plutonium. (Element Photographs). Page 129.

Promethium Element Photograph (Element Photos)
Promethium Element Photograph (Element Photos). Page 140.

Protactinium Element Sample (Element Photos)
Protactinium Element Sample (Element Photos). Page 141.

Radium Element Photo (Element Photos)
Radium Element Photo (Element Photos). Page 142.

Sulfur Pure Element Image (Element Photos)
Elemental sulfur melts from a yellow solid into a blood-red liquid. It burns with a blue flame. (Element Photos). Page 164.

Photo of Tantalum Metal in Pure Form
Tantalum is a lustrous blue-gray metal. (Element Photos). Page 168.

Thorium Pure Element (Element Photos)
Pure thorium is a lustrous silvery metal. Over the course of several months in air, it tarnishes to gray and eventually black. (Element Photos). Page 173.

Uranium in Pure Form (Element Photos)
Uranium is a silvery-white metal. (Element Photos). Page 181.

Cesium as a Pure Liquid Element (Element Photos)
Cesium is a soft silvery-gold metal with a melting point of 28C (83F). The element is shown here in liquid form. (Element Photos). Page 39.

Chromium Pure Element Photo
Chromium is a lustrous steel-gray metal. (Element Photographs). Page 45.

Gadolinium Pure Metal (Element Photographs)
Gadolinium is a lustrous silvery-white metal. (Element Photographs). Page 71.

Gallium Pure Element Sample
Pure gallium has a bright silver color. These crystals were grown by the photographer. (Element Photographs). Page 63.

Germanium Pure Element Sample (Element Photographs)
Germanium is a gray-white element with a metallic luster. (Element Photographs). Page 66.

Iridium Pure Sample (Element Photographs)
Iridium is a bright silvery-white metal, with a slight yellowish cast. (Element Photographs). Page 84.

Krypton Pure Element Sample
Krypton in a discharge tube displays its green and orange spectral signature. Gaseous krypton is colorless, while solid krypton is white. (Element Photographs). Page 87.

Lanthanum Pure Sample (Element Photographs)
Lanthanum is a soft, ductile, and malleable silvery-white metal. (Element Photographs). Page 88.

Lead Pure Sample (Element Photographs)
Lead is a heavy metal that is bluish-white when freshly cut, but tarnishes to a dull gray upon exposure to air. The pure metal is used for radioactive shielding, among other purposes. (Element Photographs). Page 89.

Mercury Pure Element
Mercury is a heavy silvery metal that is liquid at room temperature. (Element Photographs). Page 100.

Niobium Pure Sample (Element Photographs)
Niobium is a shiny gray metal that develops a bluish cast when stored in air at room temperature. (Element Photographs). Page 112.

Osmium Pure Sample (Element Photographs)
Osmium is an extremely dense lustrous blue-white metal. (Element Photographs). Page 119.

Palladium Pure Sample (Element Photographs)
Palladium is a soft silvery-white metal. (Element Photographs). Page 123.

Platinum Pure Metal (Element Photographs)
Platinum is a heavy, corrosion-resistant gray-white metal. (Element Photographs). Page 128.

Rhodium Pure Sample (Element Photographs)
Rhodium is a hard silver-white metal with a high reflectance. (Element Photographs). Page 146.

Rubidium Pure Element Sample
Rubidium is a soft silvery-white metal that liquefies at high ambient temperature. (Element Photographs). Page 149.

Samarium Pure Element (Element Photographs)
Samarium is a lustrous silvery metal. Three crystal modifications also exist. (Element Photographs). Page 153.

Selenium Pure Element Sample
Selenium occurs in several forms, but is most stable as a dense gray semiconducting semimetal. (Element Photographs). Page 155.

Technetium Pure Sample (Element Photographs)
Technetium is a silvery-gray radioactive metal. It is sometimes seen as a gray powder. (Element Photographs). Page 169.

Tellurium Pure Sample (Element Photographs)
Tellurium is a brittle silver-white metalloid. This image is of an ultra-pure tellurium crystal, 2-cm in length. (Element Photographs). Page 170.

Thallium Element Sample (Element Photographs)
Thallium is a silvery-white metal with a luster that quickly tarnishes to a dull blue-gray in air. (Element Photographs). Page 172.

Xenon Pure Sample (Element Photographs)
Xenon normally is a colorless gas, but it emits a blue glow when excited by an electrical discharge, as seen here. (Element Photographs). Page 185.

Boron Sample of a Pure Element
This is a photo of pure crystalline boron. Boron is a lustrous, black semimetal. Boron is not found free in nature. (Element Photos). Page 23.

Cadmium Image of the Element (Element Photos)
Photograph of cadmium metal, with a penny to show scale. (Element Photos). Page 27.

Carbon - Rough Diamond - Pure Elemental Form
Carbon - Rough Diamond - Pure Elemental Form. Page 33.

Carbon - Diamonds (Element Photos)
Carbon - Diamonds (Element Photos). Page 32.

Erbium Element Specimen (Element Photos)
Erbium is a soft silvery metal that does not oxidize in air as quickly as most of the rare earths. (Element Photos). Page 58.

Europium Element Image (Element Photos)
Europium oxidizes instantly in air. Even stored in mineral oil, the metal is rarely shiny. (Element Photos). Page 59.

Gold Pure Element (Element Photographs)
Crystals of gold metal. (Element Photographs). Page 70.

Carbon - Graphite - Pure Elemental Form
Photograph of graphite, one of the forms of elemental carbon. (Element Photos). Page 35.

Hafnium Pure Element Photo
Elemental hafnium metal, with a penny to indicate the scale. (Element Photographs). Page 72.

Holmium Example as a Pure Element
Holmium is a silvery-white metallic element that is relatively stable in air. (Element Photos). Page 76.

Magnesium Pure Element Photo
Photograph of the element magnesium, with a penny to indicate size of the sample. (Element Photographs). Page 98.

Manganese Pure Element Sample (Element Photographs)
Manganese is a grayish white metal, resembling iron, that is easily oxidized. (Element Photographs). Page 99.

Neodymium Specimen of an Element
Neodymium has a bright silvery luster with a yellowish tinge. When exposed to air, it quickly forms an oxide, which spalls off to expose more metal. (Element Photos). Page 104.

Neon Pure Sample (Element Photographs)
This neon filled discharge tube displays the element's characteristic reddish-orange emission. Neon normally exists as a colorless gas. (Element Photographs). Page 105.

Oxygen Pure Element Photo
Liquid oxygen is blue. (Element Photographs). Page 120.

Phosphorus Pure Element Photo
Red phosphorus is one of several forms taken by this element. (Element Photographs). Page 124.

Potassium Pure Element Photo
Chunk of potassium metal with peroxides/superoxides (yellow crystals) and ozonide (red coloring) on its surface. (Element Photographs). Page 137.

Sodium Pure Element Photo
Sodium metal chunks under mineral oil. (Element Photographs). Page 161.

Sulfur Crystal Element Picture (Element Photos)
Photograph of crystals of elemental sulfur. Sulfur is a bright yellow solid at room temperature. (Element Photos). Page 163.

Terbium Silvery Element Sample (Element Photos)
Terbium is a soft silvery-white metal. (Element Photos). Page 171.

Thulium Pure Element Metal (Element Photos)
Thulium is a lustrous bright silvery-gray metal. (Element Photos). Page 175.

Titanium Pure Element Photo
Photograph of the spongy form of titanium metal, with a penny included to indicate the size of the sample. (Element Photographs). Page 178.

Tungsten Pure Element Photo
Photograph of tungsten metal filings in a vial, with a penny included to indicate the size of the sample. (Element Photographs). Page 180.

Vanadium with Oxide Layer Pure Element (Element Photos)
This is a photo of pieces of pure vanadium, which show vanadium's characteristic rainbow-colored oxide layer. (Element Photos). Page 184.

Molybdenum Element Specimen (Element Photos)
Pure molybdenum is a silvery white metal. Presumably, this powdered molybdenum has oxidized to a darker gray. (Element Photos). Page 101.

Rhenium Metal Element Picture (Element Photos)
Rhenium is a lustrous silver-white metal. (Element Photos). Page 145.

Ruthenium Pure Metal Element Photo
Ruthenium is a hard white metal that does not tarnish at room temperature, but can oxidize explosively. (Element Photos). Page 151.

Strontium Example of Pure Element (Element Photos)
Strontium is a bright silvery metal, but it rapidly oxidizes, darkening with a yellowish color. (Element Photos). Page 166.

Vanadium Metal Pure Sample (Element Photos)
Vanadium is a silverish gray metal. (Element Photos). Page 183.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Element Photo Gallery
This is a collection of photographs of the chemical elements.

Selenium Allotropes (Element Photos)
These are samples of pure selenium, showing a black allotrope and a red allotrope. (Element Photos). Page 197.

Californium - Pure Element Photo
Californium is a man-made radioactive metal. This is a button of pure californium. (Element Photos). Page 30.

Cobalt Element Image (Element Photos)
This photo shows a high purity cube of cobalt as well as electrolytically refined pure cobalt fragments. (Element Photos). Page 46.

Potassium - Pure Element
Potassium is a soft, silvery alkali metal. This is a pearl of purified potassium stored under paraffin oil. (Element Photos). Page 136.

Germanium Element Photograph (Element Photos)
This is a sample of crystalline germanium measuring 2 cm by 3 cm. (Element Photos). Page 65.

Glowing Radioactive Curium (Element Photos)
Curium is so radioactive that it glows purple in the dark. (Element Photos). Page 52.

Niobium Crystals and Anodized Cube (Element Photos)
Niobium has a bright metallic luster that develops a blue cast when the metal is exposed to air for a long period of time.(Element Photos). Page 110.

Platinum Crystals (Element Photos)
These crystals of pure platinum were grown by gas phase transport. (Element Photos). Page 127.

Polonium Element Image (Element Photos)
This is a photo of a thin film of polonium over a stainless-steel disk, used as an alpha-particle source. (Element Photos). Page 133.

Radium as an Element (Element Photos)
Radium is a bright silver radioactive metal that darkens upon exposure to air. (Element Photos). Page 143.

Yttrium Dendrites and Cube (Element Photos)
This is a photograph of yttrium crystal dendrites and a yttrium metal cube. (Element Photos). Page 188.

Zinc Element Image (Element Photos)
This photo shows a cube of zinc, crystalline zinc from an ingot and sublimed dendritic zinc. (Element Photos). Page 190.

Rhodium as an Element
This photo shows pure rhodium powder, a pressed rhodium cylinder and a 1 g argon arc remelted rhodium ball. (Element Photos). Page 147.

Ruthenium Crystals (Element Photos)
Ruthenium is a very hard, white transition metal belonging to the platinum group. (Element Photos). Page 152.

Zirconium Crystal Bars and Cube (Element Photos)
This is a photo of zirconium crystal bars and a cube of highly purified zirconium metal. (Element Photos). Page 192.

Indium as an Element
These are bars of pure indium metal, each weighing about a pound. (Element Photos). Page 80.

Palladium as an Element
Palladium is a lustrous, silvery-white metal belonging to the platinum group of transition metals. (Element Photos). Page 122.

Einsteinium as an Element
Einsteinium is a man-made radioactive metal. The blue light results from the intense radiation produced by einsteinium. Page 56.

Neodymium Element Photo (Element Photos)
Neodymium is a soft, silvery lanthanide metal. This is ultrapure neodymium stored under argon to prevent oxidation. (Element Photos). Page 103.

Tantalum as an Element
Tantalum is a lustrous, hard, blue-gray transition metal. This is a single crystal of tantalum, crystalline fragments of tantalum, and a tantalum metal cube. Page 167.

Dysprosium Element Photo (Element Photos)
Dysprosium is a silver-colored rare earth element. This is purified dysprosium metal. (Element Photos). Page 55.

Holmium Image (Element Photos)
Holmium is a soft and malleable rare earth element belonging to the lanthanide series of elements. (Element Photos). Page 195.

Osmium Image (Element Photos)
Osmium is a brittle and hard blue-black transition metal. These crystals were grown using chemical vapor transport. (Element Photos). Page 196.

Nitrogen Glow - Pure Elements (Element Photos)
This is the glow given off by ionized nitrogen in a gas discharge tube. The purplish glow seen around lightning strikes is the color of the ionized nitrogen in air. (Element Photos). Page 113.

Liquid Nitrogen in a Dewar (Element Photos)
This is a photo of liquid nitrogen being poured from a dewar. (Element Photos). Page 116.

Oxygen in a Gas Discharge Tube (Element Photos)
This photo shows the emission of oxygen in a gas discharge tube. (Element Photos). Page 121.

Phosphorus Glow from a Pure Element
White phosphorus powder glows green in the presence of oxygen. The glow of white phosphorus as it oxidizes is really a form of chemiluminescence. (Element Photos). Page 126.

Iron Element Photos (Pure Element Photos)
This is a photograph of various forms of high-purity elemental iron. (Element Photos). Page 86.

Cadmium in its Pure Elemental Form
This is a photo of a cadmium crystal bar and a cube of cadmium metal. (Element Photos). Page 26.

Lutetium in its Pure Element Form
This is a photograph of lutetium metal and several pieces of sublimed lutetium metal dendrites (crystals). (Element Photos). Page 95.

Plutonium Buttons (Element Photos)
Pictured are buttons of pure plutonium metal, with a ruler for scale. (Element Photos). Page 130.

Glowing Pyrophoric Plutonium (Element Photos)
This plutonium sample is glowing because it is spontaneously burning as it comes into contact with air. (Element Photos). Page 132.

Thulium Seen as a Pure Element
This is a photo of several dendrites of thulium and a 1 cubic centimeter cube of thulium metal. (Element Photos). Page 174.

Uranium Metal Cubes (Element Photos)
These are cubes of pure uranium metal. (Element Photos). Page 182.

Bromine Liquid Pure Element (Element Photos)
This is pure liquid bromine. Bromine is reddish-brown as a liquid or gas. It has a metallic luster in solid form. (Element Photos). Page 25.

Calcium Nuggets (Element Photos)
These are nuggets of pure calcium metal under an argon gas atmosphere to keep them from oxidizing. (Element Photos). Page 29.

Deuterium Glow (Element Photos)
This is ionized deuterium in an IEC reactor with characteristic pink or reddish glow displayed by ionized deuterium. (Element Photos). Page 54.

Lead in Elemental Form
These are electrolytically deposited nodules of lead and a high-purity lead metal cube darkened due to oxidation. (Element Photos). Page 90.

Molybdenum Crystal and Cube (Element Photos)
This is a photo of a piece of crystalline molybdenum and a cube of molybdenum metal. (Element Photos). Page 102.

Titanium Element Crystal (Element Photos)
This is a bar of high-purity titanium crystals. (Element Photos). Page 177.

Tungsten or Wolfram Element Image (Element Photos)
These are high-purity tungsten or wolfram rods, crystals and a cube. The crystals on the tungsten rod show the oxidation layer. (Element Photos). Page 179.

Sulfur Pure Nonmetal Element
This is a sample of pure sulfur, a yellow nonmetallic element. (Element Photos). Page 165.

Chromium Crystals and Cube (Element Photos)
These are crystals of pure chromium metal and a cube of chromium. (Element Photos). Page 44.

Silicon Element in Pure Form
This is a photograph of a piece of pure elemental silicon. Silicon is a crystalline metalloid element. (Element Photos). Page 157.

Gold as an Element
Gold is a soft, malleable and ductile metal. These are crystals of pure elemental gold. (Element Photos). Page 68.

Iridium Sample - Pure Element (Element Photos)
This is a photo of a 1 troy ounce button of arc-melted iridium. Iridium is one of the transition metals. (Element Photos). Page 83.

Nickel Element Sample (Element Photos)
This is a piece of pure nickel, obtained by electrolysis. Nickel is one of the transition metals. (Element Photos). Page 109.

Silver Photo of the Pure Element (Element Photos)
This is a photo of a crystal of pure silver metal, deposited electrolytically. Note the dendrites of the crystals. (Element Photos). Page 160.

Zirconium Photo of the Pure Metal Element
This is a bar of crystalline 99.97% pure zirconium metal. (Element Photos). Page 194.

Osmium Photo of the Element (Element Photos)
This is a photo of a crystal of ultrapure osmium metal. The osmium crystal was produced by chemical transport reaction in chlorine gas. (Element Photos). Page 118.

Hafnium Crystals of the Pure Element (Element Photos)
These are crystal of hafnium, one of the transition metals. (Element Photos). Page 73.

Fluorine Simulant (Element Photos)
The element fluorine is a greenish yellow gas. This a simulant, showing how fluorine appears. The real element would corrode even borosilicate glass. (Element Photos). Page 60.

Chlorine Liquid Pure Element (Element Photos)
This is a sample of the element chlorine in its liquid form. (Element Photos). Page 43.

Chlorine Gas Sample as a Pure Element (Element Photos)
This is a sample of pure chlorine gas. Chlorine gas is a pale greenish yellow color. (Element Photos). Page 40.

Potassium Metal Chunks (Element Photos)
These are chunks of potassium metal. Potassium is a soft, silvery-white metal that quickly oxidizes. (Element Photos). Page 138.

Chlorine Liquid in Pure Form (Element Photos)
This is a flask of liquid chlorine. Chlorine gas and liquid are yellow. (Element Photos). Page 42.

Potassium Metal Beads (Element Photos)
These are beads of the metal potassium. The beads are kept in paraffin to prevent the reactive metal from oxidizing. (Element Photos). Page 135.

Hydrogen Glow from Ultrapure Hydrogen Element
This is a vial containing ultrapure hydrogen gas. Hydrogen is a colorless gas that glows violet when ionized. (Element Photos). Page 77.

Iodine Crystal of the Pure Element (Element Photos)
This is a crystal of pure iodine. Solid iodine is a lustrous blue-black color. (Element Photos). Page 82.

Lithium Metal in its Pure State (Element Photos)
These are ingots of pure lithium metal, showing a thin layer of black oxide tarnish. (Element Photos). Page 92.

Rubidium in Pure Liquid Element Form (Element Photos)
This is a sample of pure liquid rubidium metal. The colored rubidium superoxide is visible inside the ampule. (Element Photos). Page 148.

Selenium Nonmetal Pure Element (Element Photos)
This is a wafer of ultrapure selenium. This is the vitreous form of amorphous selenium, which is black. (Element Photos). Page 156.

Cesium Metal Element Photo (Element Photos)
This is an ampule containing pure cesium or caesium metal, which is a liquid at elevated temperatures. (Element Photos). Page 38.

Gallium in its Pure Element Form (Element Photos)
This is a picture of pure gallium metal crystallizing from melted liquid gallium. (Element Photos). Page 64.

Sodium Metal Pure Element (Element Photos)
Sodium is a soft, silvery reactive metal. (Element Photos). Page 162.

Cerium Element Image (Element Photos)
Cerium is a silvery metal that quickly tarnishes in air to resemble iron in color and luster. (Element Photos). Page 36.

Cobalt Pure Example (Element Photos)
Cobalt Pure Example (Element Photos). Page 47.

Copper as a Free Element in Nature
Copper as a free element in nature. (Element Photos). Page 48.

Gold Element Picture (Element Photos)
This is a photograph of the metallic element, gold. (Element Photos). Page 69.

Iron Pure Chunk (Element Photos)
Iron Pure Chunk (Element Photos). Page 85.

Liquid Nitrogen Pure Element Sample
Liquid Nitrogen Pure Element Sample. Page 114.

Lutetium Pure Element Sample (Element Photos)
Lutetium is a silvery-white corrosion-resistant metal. (Element Photos). Page 96.

Magnesium from Vapor Deposition (Element Photos)
Magnesium from vapor deposition. (Element Photos). Page 97.

Native Copper (Element Photos)
Native Copper (Element Photos). Chemistry. Page 50.

Phosphorus Allotropes in Pure Form (Element Photos)
This photo shows waxy white phosphorus (yellow cut), red phosphorus, violet phosphorus and black phosphorus. The allotropes of phosphorus have markedly different properties from each other. (Element Photos). Page 125.

Praseodymium Element Sample (Element Photos)
Praseodymium is a soft silvery metal that develops a green oxide coating that spalls off when exposed to air. (Element Photos). Page 139.

Zinc Example of Pure Metal (Element Photos)
Zinc example of the pure metal. (Element Photos). Page 189.

Bromine Pure Liquid Room Temperature Element
Bromine is a heavy, reddish-brown liquid. It is the only non-metallic element that is liquid at room temperature. (Element Photos). Page 24.

Copper Metal - Pure Element Example
Crystals of copper metal, with a penny to show scale. (Element Photographs). Page 51.

Francium Simulant (Element Photos)
Francium is extremely rare and could be expected to look something like this. (Element Photos). Page 61.

Germanium Bowl - Pure Element Example
Germanium bowl, with a copper penny to show scale. (Element Photographs). Page 67.

Helium Pure Element Photo
A helium filled discharge tube shaped like the element's atomic symbol. (Element Photographs). Page 74.

Hydrogen Pure Element Photo
NGC 604, a region of ionized hydrogen in the Triangulum Galaxy. (Element Photographs). Page 78.

Indium Pure Element Photo (Element Photographs)
Photograph of the metal indium, with a penny to indicate the size of the sample. (Element Photographs). Page 79.

Lithium Pure Element Photo
Photograph of pellets of the element lithium, with a penny to show the size of the sample. (Element Photographs). Page 93.

Neptunium Sphere of Pure Element
Neptunium is a silvery radioactive heavy metal. This is a photo of a 6-kg sphere of neptunium-237. (Element Photos). Page 107.

Nickel Pure Element Sample
Nickel is a silvery white metal, capable of taking a high polish. (Element Photographs). Page 108.

Nitrogen Pure Element Image
Image of solid, liquid, and gaseous nitrogen. (Element Photographs). Page 115.

Osmium Photo of Element (Element Photos)
This is a 1 gram bead of osmium. Osmium is extremely dense, about twice as heavy as lead. (Element Photos). Page 117.

Polonium in a Sample of Pitchblende (Element Photos)
This is a sample of pitchblende, containing polonium (and other elements). (Element Photos). Page 134.

Radon Gas in its Pure Form (Element Photos)
This is not radon, but radon looks like this. Radon glows red in a gas discharge tube, though it is not used in tubes because of its radioactivity. (Element Photos). Page 144.

Silicon Element Picture (Element Photos)
Silicon wafer with a mirror finish. (Element Photos). Page 158.

Silver Photo for Pure Element (Element Photos)
Photograph of crystals of silver metal, with a penny included to indicate the size of the sample. (Element Photos). Page 159.

Yttrium Metal Crystal - Pure Element
This is a photo of an ultrapure (99.99%) crystal of yttrium metal. The yttrium crystal, which shows the crystal dendrites, is 3 cm long and has been cast in acrylic. (Element Photos). Page 150.

Zinc Photo for Pure Element (Element Photos)
Photograph of zinc metal, with a penny to show scale. (Element Photos). Page 191.

Zirconium Pure Metal (Element Photos)
Zirconium is a lustrous, corrosion-resistant grayish-white metal. (Element Photos). Page 193.

Calcium Element Metal (Element Photos)
Calcium is a soft grayish metallic element. (Element Photos). Page 28.

Cesium Crystals of Pure Metal (Element Photos)
Cesium Crystals or Caesium Crystals (Element Photos). Page 37.

Lithium Metal in Paraffin Oil (Element Photos)
This is a photograph of lithium metal in liquid paraffin oil. (Element Photos). Page 91.

Neon Photo of Discharge Tube (Element Photos)
This is a photo of a glowing discharge tube filled with neon. (Element Photos). Page 106.

Scandium Pure Sample (Element Photos)
Scandium is a soft silvery metal that develops a slight yellow or pink cast when exposed to air. (Element Photos). Page 154.

Tin Pure Specimen of Element (Element Photos)
Tin is a crystalline silvery-white metal. When a bar of tin is bent, it emits a crackling 'tin cry' as the crystals are broken. (Element Photos). Page 176.

Ytterbium Element Photography (Element Photos)
Ytterbium is a lustrous bright silvery metal. (Element Photos). Page 186.

Yttrium Lustrous Pure Element (Element Photos)
Yttrium is a lustrous silver metal. Shavings of the metal can ignite spontaneously in air. (Element Photos). Page 187.

Boron Sample in a Vial (Element Photos)
Sample of boron in a glass vial. (Element Photos)

Fluorine Gas - Pure Element Example
Pure fluorine is a corrosive pale yellowish brown gas. (Element Photographs)

cis-1,2-Dichlorocyclohexane Chemical Structure
This is the chemical structure of cis-1,2-dichlorocyclohexane. Page 137.

trans-Dichloroethene Chemical Structure
This is the chemical structure of trans-dichloroethene. Page 135.

trans-1,2-Dichlorocyclohexane Chemical Structure
This is the chemical structure of trans-1,2-dichlorocyclohexane. Page 138.

trans-Dichloroethene Ball and Stick Model
This is the ball and stick model of trans-dichloroethene. Page 136.

Diaziridine Chemical Structure
This is the chemical structure of diaziridine. Page 140.

Diazomethane Chemical Structure
This is the chemical structure of diazomethane, also known as azimethylene. Page 139.

4-Dimethylaminobenzeneazonium Ion Chemical Structure
This is the chemical structure of the 4-dimethylaminobenzeneazonium ion. Page 141.

Dimethyltryptamine or DMT Chemical Structure - Chemical Structure of Dimethyltryptamine or DMT
This is the chemical structure of dimethyltryptamine, also known as DMT. Page 142.

Dichloromethane or Methylene Chloride
This is the chemical structure of dichloromethane or methylene chloride. Page 143.

Dextroamphetamine Chemical Structure
This is the two-dimensional skeletal structure of dextroamphetamine. Page 144.

cis-Dichloroethene Chemical Structure - Chemical Structure of cis-Dichloroethene.
This is the chemical structure of cis-dichloroethene. Page 133.

cis-Dichloroethene Ball and Stick Chemical Structure - Ball and Stick Model of cis-Dichloroethene
This is the ball and stick model of cis-dichloroethene. Page 134.

Duloxetine or Cymbalta
This is the chemical structure of the serotonin-norepinephrine reuptake inhibitor (SNRI) Duloxetine, which is sold under the trade names Cymbalta, Ariclaim, Xeristar, Yentreve, and Duzela. Page 145.

Diazepam - Valium Chemical Structure
This is the chemical structure of diazepam. Page 123.

Chemical Structures Starting with the Letter D
Browse structures of molecules and ions that have names beginning with the letter D.

Chemical Structures Starting with the Letter D
Browse structures of molecules and ions that have names beginning with the letter D.

How To Make Magnetic Slime
Try this easy recipe for magnetic slime. You can play with it like regular slime, plus it reacts to magnets to form fantastic shapes.

Homemade Silly Putty Recipes
Silly Putty was invented in 1943 when an engineer accidentally dropped boric acid into silicone oil. While you can't make that type of silly putty at home, here are several recipes to try that use common ingredients.

Temperature Unit Conversion Problem
This is a worked conversion problem showing how to convert from Kelvin to degrees Celsius and Fahrenheit.

Worked Example Problem Converting Pressure Units
Several pressure units are common in any science lab. This is a worked example problem converting units of pressure.

How to Make a Chemist Halloween Costume
It's easy to make a chemist costume. Here's how to make a chemist costume for Halloween or any costume party.

How to Make Goo - Slime Like a Liquid & Solid
Make squishy non-toxic goo that hardens in your hands when you squeeze it, but flows like a liquid when you pour it.

Argon Pure Element Ice (Element Photos)
This is melting argon ice. A drop of liquid argon is seen melting on the edge of the argon ice. (Element Photos). Page 11.

Actinium Pure Element Picture
This is a picture of pure actinium, which is a metal. (Element Photos)

Aluminium in its Pure Elemental Form
This is a piece of pure aluminium metal. (Element Photos). Page 3.

Americium Pure Element (Element Photos)
This is a disk of americium-241 viewed under a microscope. Page 6.

Berkelium Synthetic Element (Element Photos)
This is the berkelium, dissolved, that was used to synthesize element 117. It took 250 days to make this much berkelium! (Element Photos). Page 15.

Beryllium Fragment (Element Photos)
This is a chunk of high purity crystalline beryllium weighing about 140 g. (Element Photos). Page 18.

Aluminum Foil Sample (Element Photos)
This is a piece of aluminum foil. Aluminum is one element you can encounter in its pure form in everyday life. (Element Photos). Page 5.

Beryllium Photo for Pure Element (Element Photos)
This is a bead of pure beryllium (1.0 x 1.5 cm, 2.5 g). (Element Photos). Page 17.

Argon Glow from Pure Argon (Element Photos)
This is the glow of pure argon in a gas discharge tube. (Element Photos). Page 10.

Actinium Radioactive Element (Element Photos)
Actinium is a radioactive element. (Element Photos). Page 2.

Americium (Element Photos)
Americium is a lustrous silvery-white metal that slowly tarnishes in air. (Element Photos). Page 7.

Astatine Pure Halogen (Element Photos)
Astatine possesses characteristics common to other halogens, except with more metallic properties. (Element Photos). Page 13.

Berkelium Element Image (Element Photos)
Berkelium Element Image (Element Photos). Page 16.

Bismuth Picture (Element Photos)
This is a picture of the element bismuth. (Element Photos). Page 21.

Antimony from Mexico (Element Photos)
Antimony is a silvery-white crystalline metal. This photo is of a natural massive antimony with oxidation products from Arechuybo Mexico. (Element Photos). Page 8.

Arsenic with Quartz and Calcite (Element Photos)
Natural arsenic with quartz and calcite, from Ste. Marie-aux-mines, Alsace, France. Specimen is at the Natural History Museum, London. (Element Photos). Page 12.

Barium Pure Element (Element Photos)
Barium is a soft silvery-white metal, but it oxidizes very easily in air. (Element Photos). Page 14.

Bismuth Element Photo (Element Photos)
Bismuth is a crystalline white metal, with a pink tinge. The iridescent color of this bismuth crystal results from an oxide surface layer. (Element Photos). Page 20.

Aluminum Pure Sample (Element Photos)
Aluminum pure sample. (Element Photos). Page 4.

Argon in a Tube (Element Photos)
Argon is the current carrier in this discharge tube, while mercury is what produces the glow. (Element Photos). Page 9.

Beryllium Foil of Pure Element
Square of beryllium foil for an x-ray microscope vacuum window. (Element Photos). Page 19.

Iron Pure Element Specimen (Element Photos)
Iron makes up about 5% of the Earth's crust and is believed to be the 10th most abundant element in the universe. (Element Photos)

Chlorine Yellow Gas Sample (Element Photos)
Chlorine gas is a pale yellow-green, difficult to see in a sample this small. (Element Photos)

Cobalt Sample of a Pure Element (Element Photos)
Cobalt is a ferromagnetic metal, commonly found associated with nickel. (Element Photos)

Iodine in its Pure Form as an Element
Iodine is a dark-gray to purple-black solid that sublimes at normal temperatures into a purple-pink gas with an irritating odor. (Element Photos)

Polonium Simulant (Element Photos)
This photo is not polonium, but it is what you might expect polonium to look like. Polonium would have a metallic sheen. (Element Photos)

Tantalum Pure Element Image
Tantalum is a hard, lustrous, dark blue-gray metal. (Element Photos)

Dysprosium Image (Element Photos)
Dysprosium metal has a bright silver metallic luster. (Element Photos)

Plutonium Metal (Element Photos)
Plutonium is a silvery-white radioactive metal. These are pieces of pure plutonium (1945). (Element Photos)

Satellite Image of Air Pollution Over China - Science Fair Projects
Satellite Image of Air Pollution Over China - Science Fair Projects. Page 66.

Computer - Science Fair Projects
Computer - Science Fair Projects. Page 57.

Earth Day Symbol - Science Fair Projects
Earth Day Symbol - Science Fair Projects. Page 65.

Flammable Sign - Science Fair Projects
Flammable Sign - Science Fair Projects. Page 40.

Funnel - Science Fair Projects
Funnel - Science Fair Projects. Chemistry. Page 56.

Mt Mayon Volcano - Science Fair Projects
Mt Mayon Volcano - Science Fair Projects. Page 58.

Radioactive Symbol - Science Fair Projects
Radioactive Symbol - Science Fair Projects. Page 41.

Recycling Symbol - Science Fair Projects
Recycling Symbol - Science Fair Projects. Page 42.

Snow Images - Science Fair Projects
Snow Images - Scanning Electron Micrographs - Science Fair Projects. Page 39.

Volcanic Eruption - Science Fair Projects
Volcanic Eruption - Science Fair Projects. Page 59.

Mad Scientist - Science Fair Projects
This is a mad scientist in all his glory, Dr. Alexander Thorkel from the movie Dr. Cyclops (1940). Page 72.

Kilauea Volcano March 2011 - Science Fair Projects
This is a photo of the volcanic eruption of Kilauea on March 7, 2011. Page 73.

Disposable Nitrile Glove - Science Fair Projects
Disposable nitrile gloves offer superior puncture resistance compared with rubber gloves, plus they can be used by individuals with latex allergies. Page 74.

Amethyst Quartz - Science Fair Projects
Amethyst Quartz - Science Fair Projects. Page 25.

Aurora Borealis - Free Science Fair Pictures
Aurora Borealis - Free Science Fair Pictures. Page 16.

Chemostat Bioreactor - Free Science Fair Pictures
Chemostat Bioreactor - Free Science Fair Pictures. Page 18.

Citric Acid Crystals - Free Science Fair Pictures
Citric Acid Crystals - Free Science Fair Pictures. Page 17.

Crystal Meth Photo - Science Fair Projects
Crystal Meth Photo - Science Fair Projects. Page 30.

Deinonychus Dinosaur Skull - Science Fair Projects
Photograph of Deinonychus Dinosaur Skull - Science Fair Projects. Page 7.

Hurricane Elena - Science Fair Projects
Photograph of Hurricane Elena, Gulf of Mexico, September 1985. Images for Science Fair Projects. Page 5.

Hurricane Hugo - Science Fair Projects
Digitized Charleston WSR-57 radar image of hurricane Hugo. Science Fair Projects. Page 4.

Iron - Science Fair Projects
Iron - Science Fair Projects. Chemistry. Page 48.

Lightning from a Thunderstorm - Science Fair Projects
Lightning from a Thunderstorm - Science Fair Projects. Page 9.

Mad Scientist - Science Fair Projects
Mad Scientist - Science Fair Projects. Page 8.

Magnesium - Free Science Fair Pictures
Magnesium - Free Science Fair Pictures. Page 24.

Marijuana - Free Science Fair Pictures
Marijuana - Free Science Fair Pictures. Page 23.

Micropipette - Free Science Fair Pictures
Micropipette - Free Science Fair Pictures. Page 19.

Petri Dishes - Science Fair Projects
Petri Dishes - Science Fair Projects. Page 33.

Plutonium - Science Fair Projects
Pure plutonium is silvery, but acquires a yellowish tarnish as it oxidizes. Science Fair Projects. Page 49.

Spacewalk - Science Fair Projects
Spacewalk - Science Fair Projects. Page 10.

Tellurium - Science Fair Projects
Tellurium is a brittle silver-white metalloid. Science Fair Projects. Page 50.

Xenon - Science Fair Projects
Xenon normally is a colorless gas that emits a blue glow when excited by an electrical discharge. Science Fair Projects. Page 51.