Periodic Table Puzzle - Kamryn Simmons

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Across
  1. 1. My chemical symbol is Au
  2. 4. Group 9 Period 5
  3. 6. Can be calculated by subtracting the atomic number from the atomic mass
  4. 8. My chemical symbol is Y
  5. 9. I have 1 proton
  6. 11. My chemical symbol is Sn
  7. 14. My chemical symbol is Pt
  8. 19. My chemical symbol is I
  9. 20. Group 14 Period 4
  10. 21. My chemical symbol is Pb
  11. 22. They're are like onions they have layers
  12. 24. I have 16 Neutrons
Down
  1. 2. I have 8 protons
  2. 3. Are the rows in the periodic table
  3. 5. Group 12 Period 6
  4. 7. Group 15 Period 4
  5. 10. They are the columns on the periodic table.
  6. 12. I have 26 Neutrons
  7. 13. I have 31 Protons
  8. 15. My chemical symbol is Ni
  9. 16. I have 12 Neutrons
  10. 17. I have 83 protons
  11. 18. I have 30 Neutrons
  12. 23. My chemical symbol is Ag