Give one difference between cation and anion.

Cations are positively charged ions. They are formed by the loss of one or more electrons from an atom.

Example: Sodium loses 1 electron to form sodium ion Na⁺ ion.

Anions are negatively charged ions. They are formed by gaining of one or more electrons by an atom.

Example: Chlorine gains one electron and form chloride ion Cl^– ion.