Beginner's Luck (Easy)

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Across
  1. 4. Heat unit
  2. 6. Proton acceptor
  3. 11. Chlorine or bromine
  4. 12. Radioactive elements
  5. 14. _______ flask
  6. 16. On target
  7. 19. Seven
  8. 20. Reaction accelerant
  9. 21. Solute + solvent
  10. 22. Element number 16
Down
  1. 1. Type of gas
  2. 2. Shell
  3. 3. Concentration unit
  4. 5. Atomic linkage
  5. 7. Phase change
  6. 8. Pressure unit
  7. 9. Not neutral
  8. 10. Type of mixture
  9. 13. Wave period
  10. 15. Chemical equation species
  11. 17. Temperature unit
  12. 18. 6.02x10^23