Polyatomic Ions

Sulfite

Sulfite

SO3 -2

Ferrocyanide

Fe(CN)6 -4

Phosphite

PO3 -3

Phosphate

PO4 -3

Ferricyanide

Fe(CN)6 -3

Arsenate

AsO4 -4

Thiosulfate

S2O3 -2

Sulfate

SO4 -2

Silicate

SiO3 -2

Peroxide

O2 -2

Oxalate

C2O4 -2

Hydrogen Phosphate

HPO4 -2

Dichromate

Cr2O7 -2

Chromate

CrO4 -2

Carbonate

CO3 -2

Ammonium

NH4 +1

Acetate (Ethanoate)

C2H3O2 -1

Bicarbonate (Hydrogen Carbonate)

HCO3 -1

Bisulfate (Hydrogen Sulfate)

HSO4 -1

Bisulfite (Hydrogen Sulfite)

HSO3 -1

Bromate

BrO3 -1

Bromite

BrO2 -1

Chlorate

ClO3 -1

Chlorite

ClO2 -1

Cyanide

CN -1

Dihydrogen Phosphate

H2PO4 -1

Hydroxide

OH -1

Hypochlorite

ClO -1

Iodate

IO3 -1

Nitrate

NO3 -1

Nitrite

NO2 -1

Perchlorate

ClO4 -1

Permanganate

MnO4 -1

Thiocynate

SCN -1