Polyatomic Ions

Nitrate

1-, NO3-

Hydroxide

1-, OH-

Hydrogencarbonate (bicarbonate)

1-, HCO^3-

Carbonate

2-, CO3^2-

Sulfate

2-, SO4^2-

Phosphate

3-, PO4^3-

Ammonium

1+, NH4+

Acetate

Ch3COO-

Arsenate

AsO4^3-

Arsenite

Aso3^3-

Benzoate

C6H5COO-

Borate

Bo3^3-

Bromate

BrO3-

Chlorate

ClO3-

Chlorite

ClO2-

Chromate

CrO4^2-

Cyanate

CNO-

Cyanide

CN-

Dichromate

Cr2O7^2-

Dihydrogen Phosphate

H2PO4-

Hydrogen Oxalate

HC2O4-

Hydrogen Sulfate

HSO4-

Hydrogen Sulfide

HS-

Hydrogen Sulfite

HSO3-

Hypochlorite

ClO-

Iodate

IO3-

Monohydrogen Phosphate

HPO4^2-

Nitrite

NO2-

Orthosilicate

SiO4^4-

Oxalate

C2O4^2-

Perchlorate

ClO4-

Periodate

IO4-

Permanganate

MnO4^-

Peroxide

O2^2-

Pyrophospate

P2O7^4-

Sulfite

So3^2-

Thiocyanate

SCN-

Thiosulfate

S2O3^2-

Hydronium

H3O^+

Mercury

Hg2^2+