periodic table

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