polyatomic ions

sulfate

SO? �?

sulfite

SO? �?

acetate

C?H?O? �?

hydroxide

OH �?

ammonium

NH? �?

peroxide

O? �?

nitrate

NO? �??

nitrite

NO? �?

hypochlorite

ClO �?

chlorite

ClO? �?

chlorate

ClO? �?

perchlorate

ClO? �?

carbonate

CO? �?

hydrogen carbonate / bicarbonate

HCO? �?

hydrogen sulfate / bisulfate

HSO? �?

monohydrogen phosphate

HPO? �?

dihydrogen phosphate

H?PO? �?

oxalate

C?O? �?

chromate

CrO? �?

dichromate

Cr?O? �?

bromate

BrO? �?

bromite

BrO? �?

hypobromite

BrO �?

thiocyanate

SCN �?

cyanide

CN �?

permanganate

MnO? �?

iodate

IO? �?