Polyatomic Ions

Ag^+ :: silver

Zn^2+ :: zinc

NH4^+ :: ammonium

NO2^- :: nitrite

NO3^- :: nitrate

SO3^2- :: sulfite

SO4^2- :: sulfate

OH^- :: hydroxide

PO4^3- :: phosphate

CO3^2- :: carbonate

HCO3^- :: hydrogen carbonate

ClO3^- :: chlorate

ClO4^- :: perchlorate

C2H3O2^- :: acetate

MnO4^- :: permanganate