Common Polyatomic Ions

**Oxalate was switched out w/Azide **Silicate has many forms; Used Tetrahedral Silicate

Ammonium

NH4 +

Hydronium

H3O +

Nitrate

NO3 -

Nitrite

NO2 -

Perchlorate

ClO4 -

Chlorate

ClO3 -

Chlorite

ClO2 -

Hypochlorite

ClO -

Perbromate

BrO4 -

Bromate

BrO3 -

Bromite

BrO2 -

Hypobromite

BrO -

Periodate

IO4 -

Iodate

IO3 -

Iodite

IO2 -

Hypoiodite

IO -

Azide

N3 -

Cyanide

CN -

Hydroxide

OH -

Acetate

C2H3O2 - (or CH3COO -)

Permanganate

MnO4 -

Bicarbonate (Hydrogen carbonate)

HCO3 -

Bisulfate (Hydrogen sulfate)

HSO4 -

Bisulfite (Hydrogen sulfite)

HSO3 -

Dihydrogen phosphate

H2PO4 -

Sulfate

SO4 2-

Sulfite

SO3 2-

Chromate

CrO4 2-

Dichromate

Cr2O7 2-

Carbonate

CO3 2-

Peroxide

O2 2-

Hydrogen phosphate

HPO4 2-

Phosphate

PO4 3-

Phosphite

PO3 3-

Borate

BO3 3-

Oxalate

C2O4 2-

Oxide

O 2-

Silicate

SiO4 4-

Arsenate

AsO4 3-

Arsenite

AsO3 3-

Selenate

SeO4 2-

Selenite

SeO3 2-

Tellurate

TeO4 2-

Tellurite

TeO3 2-