Question

What are polyatomic ions? Give examples.
[3 Marks]

Answer 1

A group of atoms carrying a charge is called polyatomic ion.
[1 Mark]

It can be classified as polyatomic cation and polyatomic anion.

A group of atoms carrying a positive charge is called polyatomic cation. Example: ${NH}_4^{+}$, etc.
[1 Mark]

A group of atoms carrying a negative charge is called polyatomic anion. Examples: ${OH}^{-}$, ${NO}_3^{-}$ etc.
[1 Mark]