Which of the following pairs of elements would have a more negative electron gain enthalpy?
For Cl

Explanation

To determine which of the two elements, fluorine (F) or chlorine (Cl), has a more negative electron gain enthalpy, we will analyze the concept of electron gain enthalpy and the stability of the resulting anions.

### Step-by-Step Solution:

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

2. **Electron Gain of Fluorine**:
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