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
FEATURED: CHEMISTRY

Iridium, a hard, white, metallic element of the platinum family. It is found in mineral deposits with platinum and osmium.

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