Important Polyatomic Ions

Inorganic Nomenclature
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Polyatomic Ions
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Name Formula
positive ion ammonium NH4+
negative ions (1–) cyanide CN-
hydroxide OH-
nitrate NO3-
chlorate ClO3-
hydrogen carbonate HCO3-
acetate C2H3O2-
negative ions (2–) sulfate SO42-
sulfite SO32-
carbonate CO32-
negative ion (3–) phosphate PO43-