What are polyatomic ions ? Give examples.

Explanation

Polyatomic ions : Groups of atoms carrying a charge are known as polyatomic ions.
Examples :
(i) `NH_(4)^(+)` (Ammonium ion)
(ii) `NO_(3)^(-)` (Nitrate ion)
(iii) `SO_(4)^(2-)` (Sulphate ion)
(iv) `CO_(3)^(2-)` (Carbonate ion)
(v) `HCO_(3)^(-)` (Bicarbonate ion)