Question

What is an Ion.......?.

Answer 1

A positively or negatively charged ATOM is called an ion.

Eg. Na+ is an ion of sodium.

I hope this helps.

Answer 2

Atoms or Groups of atoms carrying charges are called ions.

There are two types of ions :-
-->Cations
-->Anions
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=>A positively charged ion is called a cation.
Examples - Fe ²⁺ , Mg²⁺

=>A negatively  charged ion is called a anion.

Examples - Cl⁻ , S²⁻