Polyatomic Ions

*all numbers are subscripts unless ^ used*

Acetate

Acetate

CH3COO- or C2H3O2 -

Ammonium

NH4+

Carbonate

CO32-

Chlorate

ClO3-

Chlorite

ClO2-

Chromate

CrO42-

Cyanide

CN-

Dichromate

Cr2O72-

Dihydrogen phosphate

H2PO4-

Hydrogen carbonate (bicarbonate)

HCO3-

Hydrogen phosphate

HPO42-

Hydrogen sulfate or bisulfate

HSO4-

Hydrogen sulfite or bisulfite

HSO3-

Hydroxide

OH-

Hypochlorite

ClO-

Nitrate

NO3-

Nitrite

NO2-

Oxalate

C2O42-

Permanganate

MnO4-

Perchlorate

ClO4-

Peroxide

O22-

Phosphate

PO43-

Sulfate

SO42-

Sulfite

SO32-

Thiocyanate

SCN-