Periodic Table
Across
- 2. Group 18, Period 3
- 4. Si
- 5. H
- 7. Atomic number 12
- 9. Group 13, Period 3
- 11. Group 2 Period 4
- 13. Ne
- 16. O
- 17. Li
- 19. Au
Down
- 1. Group 13, Period 2
- 3. Atomic number 7
- 6. Group 12, Period 4
- 7. Atomic number 25
- 8. Hg
- 9. As
- 10. Atomic number 16
- 12. Group 14, Period 2
- 14. Co
- 15. He
- 18. Group 8, Period 4