Chemistry Common Polyatomic Ions

Acetate

C2H3O2^-

Ammonium

NH4^+

Arsenate

AsO4^3-

Arsenite

AsO3^3-

Azide

N3^-

Benzoate

C7H5O2^-

Borate

BO3^3-

Bromate

BrO3^-

Carbonate

CO3^2-

Chlorate

ClO3^-

Chlorite

ClO2^-

Chromate

CrO4^2-

Cyanide

CN^-

Dichromate

Cr2O7^2-

Dihydrogen Phosphate

H2PO4^-

Dihydrogen Phosphite

H2PO3^-

Hydrogen Carbonate (Bicarbonate)

HCO3^-

Hydrogen Phosphate

HPO4^2-

Hydrogen Phosphite

HPO3^2-

Hydrogen Sulfate

HSO4^-

Hydrogen Sulfite

HSO3^-

Hydrogen Sulfide

HS^-

Hydroxide

OH^-

Hypochlorite

ClO^-

Iodate

IO3^-

Manganate

MnO4^2-

Nitrate

NO3^-

Nitrite

NO2^-

Oxalate

C2O4^2-

Perchlorate

ClO4^-

Permanganate

MnO4^-

Peroxide

O2^2-

Phosphate

PO4^3-

Phosphite

PO3^3-

Silicate

SiO3^2-

Sulfite

SO3^2-

Sulfate

SO4^2-

Tartrate

C4H4O6^2-

Thiocyanate

SCN^-

Thiosulfate

S2O3^2-

Hexafluorosilicate

SiF6^2-