Poly tonic ions

Acetate

C2H3O2-

Ammonium

NH4 1+

Cyanide

CN-

Hydroxide

OH-

permanganate

MNO4-

thiocyanate

SCN-

chromate

CrO4 2-

dichromate

Cr2O7 2-

oxalate

C2O4 2-

peroxide

O2 2-

citrate

C6H5O7 3-

bromate

BrO3 -

chlorate

ClO3 -

iodate

IO3 -

nitrate

NO3 -

carbonate

CO3 2-

selenate

SeO4 2-

silicate

SiO3 2-

sulfate

SO4 2-

arsenate

AsO4 3-

borate

BO3 3-

phosphate

PO4 3-

hypochlorite

ClO-

chlorite

ClO2-

perchlorate

ClO4-

hydrogen carbonate

HCO3-

hydrogen sulfate

HSO4-

nitrite

NO2-

hydrogen phosphate

HPO4^2-

dihydrogen phosphate

H2PO4-

sulfite

SO3^2-

thiosulfate

S2O3 2-

phosphite

PO3 3-