polyatomic ions

acetate

acetate

C2H3O2 -

arsenate

AsO4 3-

arsenite

AsO3 3-

borate

BO3 3-

perborate

BO4 3-

perbromate

BrO4 -

bromate

BrO3 -

bromite

BrO2 -

hypobromite

BrO -

carbonate

CO3 2-

permanganate

MnO4 -

manganate

MnO3 -

ammonium

NH4 +

nitrate

NO3 -

nitrite

NO2 -

hydroxide

OH -

peroxide

O2 2-

cyanate

OCN -

cyanide

CN -

oxalate

C2O4 2-

phosphate

PO4 3-

phosphite

PO3 3-

thiocyanate

SCN -

perchlorate

ClO4 -

chlorate

ClO3 -

chlorite

ClO2 -

hypochlorite

ClO -

thiosulfate

S2O3 2-

sulfate

SO4 2-

sulfite

SO3 2-

chromate

CrO4 2-

chromite

CrO3 2-

dichromate

Cr2O7 2-

periodate

IO4 -

iodate

IO3 -

iodite

IO2 -

hypoiodite

IO -

silicate

SiO4 4-

hydrogen carbonate

HCO3 -

hydrogen sulfate

HSO4 -

hydrogen sulfite

HSO3 -

hydrogen oxalate

HC2O4 -

hydrogen phosphate

HPO4 2-

dihydrogen phosphate

H2PO4 -

hydrogen phthalate

HC8H4O4 -

phthalate

C8H4O4 2-