1. Polyatomic Ions
Formulas and Names

2. Hydroxide
OH-

3. Nitrate
NO3-

4. Carbonate
CO3 -2

5. Sulfate -2
SO4

6. Dihydrogen Phosphate -1
H2PO4

7. Acetate
C2H3o2-

8. Hydrogen Sulfite
HSO3-

9. Hydrogen Sulfate
HSO4 - -1

10. Hydrogen Carbonate
HCO3-- -1

11. Nitrite
NO2-

12. Cyanide
CN-

13. Nitrate
NO3-

14. Permanganate
MnO4 -1

15. Hypochlorite
ClO -1

16. Chlorite
ClO2-

17. Chlorate
ClO3 -

18. Hydrogen Phosphate -2
HPO4

19. Bromate
BrO3 -1

20. Ammonium +1
NH4

21. Iodate -1
IO3

22. Periodate -1
IO4

23. Thiosulfate
S2O3 -2

24. Peroxide -2 O2

25. Dichromate
Cr2O7 -2

26. Chromate -2
CrO4

27. Phosphate -3
PO4

28. Arsenate -3
AsO4

29. Oxalate -2
C2O4

30. Thiocyanate -1
NCS

31. Selenate -2
SeO4

32. Sulfite -2
SO3

33. Perchlorate -1
HClO4

34. Amide
NH2 -

35. Phosphite
PO3 -3

36. Arsenate
AsO4 -3

37. HypoBromite
BrO
- 1

38. Hydrogen Oxalate (bioxalate)
HC2O4 -1

39. Hydrogen Sulfide HS -1

40. Tetraborate
B4O7 -2

41. Borate
BO3 -3

42. Hexafluorosilicate
Si F6 -2

43. Silicate