Polyatomic Ions

Ammonium

NH4+

Acetate

C2H3O2-

Azide

N3-

Hydroxide

OH-

Cyanide

CN-

Thiosyanide

SN-

Hydrogen Carbonate or Bicarbonate

HCO3-

Carbonate

CO3 2-

Perchlorate

ClO4-

Chlorate

ClO3-

Chlorite

ClO2-

Hypochlorite

ClO-

Chromate

CrO4 2-

Dichromate

Cr2O7 2-

Hydrogen Phosphate

HPO4 2-

Dihydrogen Phosphate

H2PO4-

Phosphate

PO4 3-

Phosphite

PO3 3-

Nitrate

NO3-

Nitrite

NO2-

Oxalate

C2O4 2-

Permanganate

MnO4-

Peroxide

O2 2-

Hydrogen Sulfate or Bisulfate

HSO4-

Sulfate

SO4 2-

Sulfite

SO3 2-