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Nomenclature of Polyatomic Ions in General Chemistry

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  • Ammonium


    \(NH_4^{+}\) and a charge of +1.

  • Hydroxide


    \(OH^-\) with a charge of -1.

  • Nitrate


    \(NO_3^-\) with a charge of -1.

  • Carbonate ion?


    \(CO_3^{2-}\) with a charge of -2.

  • Sulfate


    \(SO_4^{2-}\) with a charge of -2.

  • Phosphate ion?


    \(PO_4^{3-}\) with a charge of -3.

  • What is the general charge of polyatomic ions listed in this set?

    Polyatomic ions can have charges of +1, -1, -2, or -3 depending on the ion.

  • Which polyatomic ion has a positive charge?

    Ammonium (\(NH_4^+\)) is the only positively charged polyatomic ion listed.

  • Which polyatomic ions have a -1 charge?

    Hydroxide (\(OH^-\)) and Nitrate (\(NO_3^-\)) have a -1 charge.

  • Which polyatomic ions have a -2 charge?

    Carbonate (\(CO_3^{2-}\)) and Sulfate (\(SO_4^{2-}\)) have a -2 charge.

  • Which polyatomic ion has a -3 charge?

    Phosphate (\(PO_4^{3-}\)) has a -3 charge.