Polyatomic Ions

Nitrate: NO3 1-

Chlorate: ClO3 1-

Carbonate: CO3 2-

Sulfate: SO4 2-

Phosphate: PO4 3-

Ammonium: NH4 -

Hydroxide: OH -

Fluorate: FO3 -

Bromate: BO3 -

Iodate: IO3 -

Silicate: SiO3 2-

Chromate: CrO4 2-

Dichromate: CrO7 2-

Acetate: CH3COO -