Matter and Energy

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Across
  1. 1. eletriccharge
  2. 3. families
  3. 4. Atomic number
  4. 7. atom
  5. 9. electron
  6. 10. base
  7. 11. groups
  8. 12. enzyme
  9. 15. acid
  10. 16. neutron
  11. 17. period
  12. 18. reduction
  13. 19. alcohol
Down
  1. 2. chemical formula
  2. 5. Chemical reaction
  3. 6. valence electron
  4. 8. energy levels
  5. 13. molecule
  6. 14. cation
  7. 17. proton