AP Chemistry Polyatomic ions

acetate

acetate

C2H3O2 (-1)

ammonium

NH4 (+1)

arsenate

AsO4 (-3)

borate

BO3 (-1)

Bromate

BrO3 (-1)

Carbonate

CO3 (-2)

Chlorate

CLO3 (-1)

chlorite

CLO2 (-1)

Chromate

CrO4 (-2)

cyanide

CN (-1)

dichromate

Cr2O7 (-2)

dihydrogen phosphate

H2PO4 (-1)

disulfide

S2 (-2)

hydrogen carbonate (bicarbonate)

HCO3 (-1)

hypochlorite

CLO (-1)

hydrogen phosphate

HPO4 (-2)

hydrogen sulfate (bisulfate)

HSO4 (-1)

hydrogen sulfite (bisulfite)

HSO3 (-1)

hydronium

H3O (+1)

hydroxide

OH (-1)

Iodate

IO3 (-1)

Mercury (I)

Hg2 (+2)

Nitrate

NO3 (-1)

Nitrite

NO2 (-1)

Oxalate

C2O4 (-2)

Perchlorate

CLO4 (-1)

Permanganate

MNO4 (-1)

Peroxide

O2 (-2)

Phosphate

PO4 (-3)

phosphite

PO3 (-3)

silicate

SiO3 (-2)

Sulfate

SO4 (-2)

sulfite

SO3 (-2)

thiosulfate

S2O3 (-2)

thiocyanate

SCN (-1)