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