polyatomic ions

Mercury (I)

Hg22+

Ammonium

NH4+

Nitrite

NO2-

Nitrate

NO3-

Sulfite

SO32-

Sulfate

SO42-

Hydrogen Sulfate

HSO4-

Hydroxide

OH-

Cyanide

CN-

Phosphate

PO43-

Hydrogen Phosphate

HPO42-

Dihydrogen Phosphate

H2PO4-

Thiocyanate

SCN-

Carbonate

CO32-

Hydrogen Carbonate (bicarbonate)

HCO3-

Hypochlorite

ClO-

Chlorite

ClO2-

Perchlorate

ClO4-

Acetate

CH3COO-

Permanganate

MnO4-

Dichromate

Cr2O72-

Chromate

Cro42-

Peroxide

O22-

Oxalate

C2O42-

Chlorate

ClO3-