Explain Mass defect and Binding energy and establish a relation between them.

Explanation

### Step-by-Step Solution:

**Step 1: Understanding Mass Defect**
- Mass defect refers to the difference between the mass of a nucleus and the sum of the masses of its individual protons and neutrons (nucleons) when they are free and not bound in the nucleus.
- When nucleons come together to form a nucleus, some mass is converted into energy, which is released during the formation of the nucleus.

**Step 2: Formula for Mass Defect**
- Let:
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