Polyatomic Ions

Acetate

Acetate

CH3COO(-)

Carbonate

CO3(2-)

Bicarbonate (or hydrogen carbonate)

HCO3(-)

Nitrate

NO3(-)

Nitrite

NO2(-)

Sulfate

SO4(2-)

Sulfite

SO3(2-)

Phosphate

PO4(3-)

Hydrogen Phosphate

HPO4(2-)

Dihydrogen phosphate

H2PO4(-)

Oxalate

C2O4(2-)

Cyanide

CN(-)

Chromate

CrO4(2-)

Dichromate

Cr2O7(2-)

Permanganate

MnO4(-)

Peroxide

O2(2-)

Azide

N3(-)

Per__ate

XO4(-)

__ate

XO3(-)

__ite

XO2(-)

Hypo__ite

XO(-)

Ammonium

NH4(+)

Hydroxide

OH(-)

Hydronium

H3O(+)