Selenium, a chemical element. Selenium exists in four forms, one metallic and three nonmetallic.
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WHAT'S INSIDE: CHEMISTRY
Chemistry is the science of matter and the changes it undergoes during chemical reactions. In this section, learn about everyday chemistry, from chlorine beach to helium, and even why chocolate turns gray.
- Chemical Elements
- Chemical Compounds
- Chemical Processes and Tests
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Chemical Processes and Tests
Chemical processes and tests allow chemists to ascertain the properties of various substances. By utilizing chemical processes and tests, scientists can look at life on the atomic level. Click here to find some articles on chemical processes and tests.
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FEATURED: CHEMISTRY
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How the Periodic Table Works
It begins with an unassuming "H" and ends in crazy elements that you've likely never heard of. But the periodic table, encapsulated on a mere sheet of paper, can be a scientist's best friend and a testament to our human drive to organize the world.
How Aluminum Works
Once considered a semiprecious metal alongside gold and silver, aluminum pretty much languished in obscurity until the 19th century. How did the metal become so ubiquitous?
