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

My parents just came back from Belgium and they brought me several boxes of chocolates. Some of the candy is sort of grayish looking. Is it okay to eat?

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