chemistry

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Across
  1. 2. another word for pure
  2. 3. when protons and electrons cancel each other out to make a atom electrically neutral
  3. 6. number of protons
  4. 10. has a positive charge and is found inside the nucleus
  5. 11. impure substance, combinations of elements which aren't fixed
  6. 12. has a neutral charge located inside the nucleus
Down
  1. 1. smallest part of a compound
  2. 2. another word for mixture
  3. 4. pure substance that only contains one type of atom
  4. 5. smallest breakdown for an element
  5. 7. number of protons plus electrons
  6. 8. 2 or more elements chemically combined
  7. 9. negative charge located in a shell outside the nucleus