polyatomic ions

Hydroxide

OH-

Cyanide

CN-

Nitrite

NO2-

Ntrate

NO3-

Chlorate

ClO3-

Chlorite

ClO2-

Hypochlorite

ClO-

Perchlorate

ClO4-

Iodate

IO3-

Periodate

IO4-

Bromate

BrO3-

Permanganate

MnO4-

Thiocyanate

SCN-

Bisulfate

HSO4-

Bisulfite

HSO3-

Bicarbonate

HCO3-

Acetate

C2H3O2-

Sulfite

SO3 2-

Sulfate

SO4 2-

Carbonate

CO3 2-

Chromate

CrO4 2-

Dichromate

Cr2O7 2-

Silicate

SiO3 2-

Peroxide

O2 2-

Selenate

SeO4 2-

Tartrate

C4H4O6 2-

Molybdate

MoO4 2-

Tetraborate

B4O7 2-

Thiosulfate

S2O3 2-

Oxalate

C2O4 2-

Phosphate

PO4 3-

Phosphite

PO3 3-

Ferricyanide

Fe(CN)6 3-

Citrate

C6H5O7 3-

Ferrocyanide

Fe(CN)6 4-

Ammonium

NH4+