Chem Review Crossword by Talon

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Across
  1. 1. when two+ atoms bond with one+ electron pairs
  2. 4. the amount of protons in an element
  3. 8. what goes into a reaction
  4. 11. a positively charged ion
  5. 12. a positive atom
Down
  1. 2. cannot be broken down or changed
  2. 3. a negatively charged ion
  3. 5. the quantity of matter
  4. 6. a negative atom
  5. 7. what comes out of a reaction
  6. 9. basic unit of chemistry
  7. 10. atom with no charge