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

Alkaloid, a chemical substance of plant origin composed of carbon, hydrogen, nitrogen, and (usually) oxygen.

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