Across
- 1. symbol Pb
- 4. symbol Xe
- 6. symbol Sn
- 8. symbol h
- 10. symbol Ag
- 11. symbol I
- 12. symbol Ni
- 17. symbol he
- 18. symbol Au
- 19. symbol Rn
Down
- 2. symbol AR
- 3. symbol mg
- 5. symbol o
- 6. symbol w
- 7. symbol BR
- 9. symbol Na
- 13. symbol cu
- 14. symbol NE
- 15. symbol Zn
- 16. symbol b