The value of electron affinity for inert gases is ________.

Explanation

### Step-by-Step Solution:

1. **Define Electron Affinity**:
- Electron affinity is defined as the amount of energy released when an electron is added to a neutral isolated gaseous atom.

2. **Understand Inert Gases**:
- Inert gases, also known as noble gases, include elements like helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). These gases have a complete outer electron shell, which makes them chemically stable.

3. **Electronic Configuration**:
- The electronic configuration of inert gases is such that they have a full valence shell:
- Helium: 1s²
- Neon: 1s² 2s² 2p⁶
- Argon: 1s² 2s² 2p⁶ 3s² 3p⁶
- This complete filling means that they do not require additional electrons to achieve stability.

4. **Tendency to Accept Electrons**:
- Since inert gases already have a stable electronic configuration, they have no tendency to accept additional electrons.

5. **Conclusion**:
- Therefore, the value of electron affinity for inert gases is zero. They do not release energy when an electron is added because they do not want to accept an electron.

### Final Answer:
The value of electron affinity for inert gases is **zero**.

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