What are polyatomic ions? Give examples.
(N/A) polyatomic ion is a group of atoms carrying a fixed net charge (either positive or negative) that behaves as a single unit during chemical reactions.
Examples:
$(i)$ Carbonate ion: $CO_3^{2-}$
$(ii)$ Sulphate ion: $SO_4^{2-}$
$(iii)$ Ammonium ion: $NH_4^+$
$(iv)$ Phosphate ion: $PO_4^{3-}$
Examples:
$(i)$ Carbonate ion: $CO_3^{2-}$
$(ii)$ Sulphate ion: $SO_4^{2-}$
$(iii)$ Ammonium ion: $NH_4^+$
$(iv)$ Phosphate ion: $PO_4^{3-}$
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