Polyatomic Ions

Ammonium

Ammonium

NH4+

Acetate

C2H3O2-

Carbonate

CO3 -2

Perchlorate

ClO4-

Chlorate

ClO3-

Chlorite

ClO2-

Hypochlorite

ClO-

Chromate

CrO4 -2

Cyanide

CN-

Dichromate

Cr2O7 -2

Nitrate

NO3-

Nitrite

NO2-

Phosphate

PO4 -3

Sulfate

SO4 -2

Peroxide

O2 -2

Hydrogen Carbonate (Bicarbonate)

HCO3-

Hydroxide

OH-

Permanganate

MnO4-

Phosphite

PO3 -3

Hydrogen Phosphate

HPO4 -2

Dihydrogen Phosphate

H2PO4-

Sulfite

SO3 -2

Hydrogen Sulfate (Bisulfate)

HSO4-

Amide

NH2-

Dihydrogen Phosphate

H2PO4-

Hydrogen Carbonate (Bicarbonate)

HCO3-

Hydrogen Sulfate

HSO4-

Thiocyanate

SCN-

Hydrogen Phosphate

HPO4 -2

Oxalate

C2O4 -2

Thiosulfate

S2O3 -2

Arsenate

AsO4 -3

Hydronium

H3O+

Mercury (I)

Hg2 +2

Azide

N3-

Formate

HCO2-