Pt.1 polyatomic ions

ammonium

NH4^+

nitrate

NO3^-

nitrite

NO2^-

sulfate

SO4^2-

sulfite

SO3^2-

hydrogen sulfate

HSO4^-

hydroxide

OH^-

cyanide

CN^-

phosphate

PO4^3-

phosphite

PO3^3-

hydrogen phosphate

HPO4^2-

dihydrogen phosphate

H2PO4^2-

triiodide

I3^-

iodate

IO3^-

bromate

BrO3-