A molecule or an atom that is charged is called an ion. The positive charge carriers are called cations while the negative charge carriers are anions. The charge is due to the donation or receiving of the electrons.
The ion made up of more than one atom is called a polyatomic ion.
- When two or more atoms bond covalently is called polyatomic ions.
- They do not hold a net charge equivalent to zero.
- Examples of polyatomic ions are bicarbonates, acetates etc.
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