Polyatomic Ions (Chem Formula First)

Dichromate

Cr2O7-2

Bioxalate

HC2O4-1

Hydrogen Phosphate

HPO4-2

Phosphate

PO4-3

Sulfate

SO4-2

Sulfite

SO3-2

Phosphite

PO3-3

Chromate

CrO4-2

Bisulfite or hydrogen sulfite

HSO3-1

Nitrate

NO3-1

Bromate

BrO3-1

Carbonate

CO3-2

Hydroxide

OH-1

Hypobromite

BrO-1

Peroxide

O2-2

Permanganate

MnO4-1

Thiocyanate

SCN-1

Bisulfide or Hydrogen Sulfide

HS-1

Iodate

IO3-1

Bromite

BrO2-1

Perbromate

BrO4-1

Chlorite

ClO2-1

Ammonium

NH4+1

Chlorate

ClO3-1

Perchlorate

ClO4-1

Acetate

C2H3O2-1

Nitrite

NO2-1

Hypochlorite

ClO-1

Cyanide

CN-1

Bicarbonate

HCO3-1

Bisulfate or Hydrogen Sulfate

HSO4-1

Hypoiodite

IO-1

Iodite

IO2-1

Periodate

IO4-1

Oxalate

C2O4-2

Thiosulfate

S2O3-2