Halogens have maximum negative electron gain enthalpy. Explain why ?

Explanation

### Step-by-Step Solution:

1. **Definition of Electron Gain Enthalpy**:
- Electron gain enthalpy is defined as the amount of energy released when an electron is added to a neutral gaseous atom. A more negative value indicates a greater tendency to gain an electron.

**Hint**: Remember that the more negative the electron gain enthalpy, the more energy is released when an electron is added.

2. **Characteristics of Halogens**:
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