What are polyatomic ions?

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What are polyatomic ions?

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Answer 1 · 2016-06-26T06:54:58

Polyatomic ions are molecular species that happen to have a charge, an excess or deficiency of electrons; e.g. $N O_{3}^{-}, C l O_{4}^{-}, S O_{4}^{2 -}$ $NO_3^(-), ClO_4^(-), SO_4^(2-)$ .

Explanation:

Take the neutral oxygen molecule, $O = O$ $O=O$ , add 2 electrons, and we have the peroxide ion, $^{-} O - O^{-}$ $""^(-)O-O^-$ . Of course, this species is associated with $K^{+}$ $K^+$ / $N a^{+}$ $Na^+$ counterions; how many?

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What are polyatomic ions?

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