Polyatomic Ions

C2H3O2 1-

Acetate

NH4 1+

Ammonium

OH 1-

Hydroxide

NO3 1-

Nitrate

NO2 1-

Nitrite

ClO3 1-

Chlorate

MnO4 1-

Permanganate

CrO4 2-

Chromate

SO4 2-

Sulfate

SO3 2-

Sulfite

HSO4 1-

Hydrogen sulfate

CO3 2-

Carbonate

HCO3 1-

Hydrogen carbonate

PO4 3-

Phosphate

Hg2 2+

Mercury

Cr2O7 2-

Dichromate

O2 2-

Peroxide

ClO4 1-

perchlorate

ClO2 1-

chlorite

ClO 1-

hypochlorite

CN 1-

cyanide