Polyatomic ions Chem1A

NH4+

Ammonium ion

Hg2^2+

Mercury(I) ion

CN^-

Cyanide ion

CH3CO2^- or C2H3O2^-

Acetate ion

CO3^{2-}

Carbonate ion

HCO3^-

Bicarbonate ion or hydrogen carbonate ion

C2O4^{2-}

Oxalate ion

NO2^-

Nitrite ion

NO3^-

Nitrate ion

PO4^{3-}

Phosphate ion

HPO4^{2-}

Hydrogen phosphate ion

H2PO4^-

Dihydrogen phosphate ion

OH^-

Hydroxide ion

SO3^{2-}

Sulfite ion

SO4^{2-}

Sulfate ion

HSO4^-

Hydrogen sulfate ion or bisulfate ion

ClO^-

Hypochlorite ion

ClO2^-

Chlorite ion

ClO3^-

Chlorate ion

ClO4^-

Perchlorate ion

BrO^-

Hypobromite ion

BrO2^-

Bromite ion

BrO3^-

Bromate ion

BrO4^-

Perbromate ion

IO^-

Hypoiodite ion

IO2^-

Iodite ion

IO3^-

Iodate ion

IO4^-

Periodate ion

CrO4^{2-}

Chromate ion

Cr2O7^{2-}

Dichromate ion

MnO4^-

Permanganate ion

O2^{2-}

Peroxide ion

SCN^-

Thiocyanate ion