Common Polyatomic Ions

COMMON POLYATOMIC IONS

-1 CHARGE -2 CHARGE

Formula Name Formula Name

H2PO4- Dihydrogen phosphate HPO42- Hydrogen phosphate

C2H3O2- Acetate C2O42- Oxalate

HSO3- Bisulfite (Hydrogen sulfite) SO32- Sulfite

HSO4- Bisulfate (Hydrogen sulfate) SO42- Sulfate

HCO3- Bicarbonate (Hydrogen carbonate) CO32- Carbonate

NO2- Nitrite CrO42- Chromate

NO3- Nitrate Cr2O72- Dichromate

CN- Cyanide C4H4O62- Tartrate

OH- Hydroxide O22- Peroxide

MnO4- Permanganate

ClO- Hypochlorite

ClO2- Chlorite

ClO3- Chlorate

ClO4- Perchlorate

-3 CHARGE +1 CHARGE

Formula Name Formula Name

PO43- Phosphate NH4+ Ammonium

PO33- Phosphite

AsO43- Arsenate

FORMULAS & NAMES OF COMMON METAL IONS WITH MORE THAN ONE IONIC CHARGE

Formula Stock Classical Formula Stock Classical

Cu+1 Copper (I) Cuprous Sn+4 Tin (IV) Stannic

Cu+2 Copper (II) Cupric Cr+2 Chromium (II) Chromous

Fe+2 Iron (II) Ferrous Cr+3 Chromium (III) Chromic

Fe+3 Iron (III) Ferric Mn+2 Manganese (II) Manganous

Hg2+2 Mercury (I) Mercurous Mn+3 Manganese (III) Manganic

Hg+2 Mercury (II) Mercuric Co+2 Cobalt (II) Cobaltous

Pb+2 Lead (II) Plumbous Co+3 Cobalt (III) Cobaltic

Pb+4 Lead (IV) Plumbic

Sn+2 Tin (II) Stannous