Polyatomic Ion Charges

OH (Hydroxide)

1-

NO3 (Nitrate)

1-

C2H3O2 (Acetate)

1-

CN (Cyanide)

1-

MnO4 (Permaganate)

1-

CO3 (Carbonate)

2-

SO4 (Sulfate)

2-

Cr2O7 (Dichromate)

2-

PO4 (Phosphate)

3-

NH4 (Ammonium)

1+

CrO4 (Chromate)

2-

O2 (Peroxide)

2-

C2O4 (Oxalate)

2-

S2O3 (Thiosulfate)

2-

HCO3 (Bicarbonate)

1-

SCN (Thiocyanate)

1-

ClO4 (Perchlorate)

1-

ClO (hypochlorite)

1-

NO2 (Nitrite)

1-

PO3 (Phosphite)

3-

SO3 (Sulfite)

2-

H3O (Hydronium)

1+