Element Crossword Puzzle

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Across
  1. 4. 1 Proton
  2. 7. 11 Electrons
  3. 11. 26 Protons
  4. 12. 9 Electrons
  5. 14. 30.974 Atomic Mass
  6. 15. 93 Protons
  7. 17. 10 Protons
  8. 18. 44.956 Atomic Mass
  9. 20. 40.078 Atomic Mass
Down
  1. 1. Atomic Mass 28.086
  2. 2. Symbol He
  3. 3. Symbol Sn
  4. 5. 7 Electrons
  5. 6. Symbol Li
  6. 8. 84 Protons
  7. 9. 254 Atomic Mass
  8. 10. Symbol Pb
  9. 13. Symbol K
  10. 16. 27 Protons
  11. 19. 200.59 Atomic Mass