1. Chemical symbol for Berkelium
3. (HSO3)1-
5. (CN)1-
7. Chemical symbol for Barium
10. (ClO2)1-
13. Chemical for Palladium
14. (NO3)1-
15. (ClO4)1-
18. Chemical symbol for Nickel
20. (C2O4)2-
Down
1. (HClO3)1-
2. (HSO4)1-
4. (SO3)2-
6. (SO4)2-
8. Prefix meaning many
9. Ne
11. (OH)1-
12. (NO2)1-
16. (NH4)1-
17. (PO4)3-
19. In partnership
21. (C2H3O2)1-