Which of the following pairs of elements would have a more negative electron gain enthalpy?
O or F

Explanation

To determine which of the two elements, oxygen (O) or fluorine (F), has a more negative electron gain enthalpy, we can follow these steps:

### 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 gas phase. A more negative value indicates that energy is released more significantly when an electron is added.

2. **Position in the Periodic Table**:
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