Chemistry

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Across
  1. 2. electrons on the outer shell
  2. 4. positive charged atom
  3. 7. a reaction where a compound is broken down
  4. 8. number of protons and neutrons in the nucleus
  5. 10. sharing of electrons
  6. 13. an atom with a neutral charge
  7. 14. an atom with a negative charge
Down
  1. 1. atoms of an element with different masses
  2. 3. center of an atom
  3. 5. negative charged atom
  4. 6. an atom with a positive charge
  5. 9. chemical substances on the left side of a chemical equation
  6. 11. smallest unit of an element
  7. 12. transfer of electrons