Periodic Table

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Across
  1. 2. First element on the table
  2. 7. Group 2 Period 2
  3. 9. Chemical symbol Cu
  4. 10. Atomic mass 19.00
  5. 11. Chemical symbol of Ag
  6. 12. Chemical symbol of K
  7. 13. Chemical symbol of Sn
  8. 14. Atomic mass of 12.01
  9. 15. Group 17 Period 3
  10. 16. Chemical symbol of Na
  11. 19. Atomic mass of 26.98
  12. 20. Found under sulfur
  13. 22. Has 28 electrons
  14. 25. Atomic mass of 83.80
  15. 26. Atomic mass of 14.01
  16. 27. Chemical symbol of W
  17. 28. First element in group 18
Down
  1. 1. Found before germanium
  2. 3. Atomic mass of 151.97
  3. 4. Chemical symbol of Pb
  4. 5. Atomic mass of 28.09
  5. 6. Has 35 electrons
  6. 8. Chemical symbol Hg
  7. 10. Atomic number of 87
  8. 12. Atomic mass of 30.97
  9. 17. Has 20 electrons
  10. 18. Named after the planet Neptune
  11. 21. Chemical symbol Fe
  12. 23. Atomic mass of 24.31
  13. 24. Group 12 Period 4