Chemistry

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Across
  1. 4. Negatively charged subatomic atom
  2. 7. Impure substance
  3. 9. Number of protons and neutrons in an atom
  4. 10. 2 or more elements bonded together
  5. 11. Not charged subatomic atom
  6. 12. 2 or more atoms bonded together
  7. 13. Mass compared to relative things
Down
  1. 1. A pure substance that contains only 1 type of atom
  2. 2. Pure substance
  3. 3. Smallest part of an element
  4. 5. An impure substance
  5. 6. Number of protons in an atom
  6. 8. Positively charged subatomic atom