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### Theory:

Types of ions:
Ions are classified into two types. They are:
• Cations
• Anions
Cations:
If an atom loses one or more electrons during a chemical reaction, it gains a positive charge. These are referred to as cations (or positive radicals).
Anions:
If an atom gains one or more electrons during a chemical reaction, it gains a negative charge. These are referred to as anions(or negative radicals).
Types of ion: Anion and Cation

1. Sodium atom loses one electron to achieve stable electronic configuration, and it becomes a cation.

2. The sodium ion is described as $$Na^+$$.

3. Chlorine atom gains one electron to achieve stable electronic configuration, and it becomes anions.

4. The chlorine ion is described as $$Cl^-$$.

Ion Classification