The Periodic Table

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123456789101112131415161718192021
Across
  1. 3. Element with atomic symbol Fe
  2. 8. Element with 16 neutrons
  3. 9. Element with atomic weight of 207.2
  4. 10. Element with atomic number 107
  5. 12. Element with 56 protons
  6. 13. Element with three more electons than oxygen
  7. 14. Element with atomic symbol of Sn
  8. 15. Element named after the "father of the periodic table"
  9. 19. Element with three less electrons than Neon
  10. 21. Element used in filling balloons
Down
  1. 1. Element with atomic weight of 58.693
  2. 2. Element found in bananas
  3. 4. Element used in jewelry (yellowish)
  4. 5. Element used in pools to kill bacteria
  5. 6. Element that is the strongest metal
  6. 7. Element with 20 neutrons
  7. 11. Element with 1 proton, 1 electron and atomic weight of 1.008
  8. 16. Element with atomic number 92
  9. 17. Element with all three energy levels full
  10. 18. Element with atomic symbol K
  11. 20. Element with 2 full energy levels