Comment on the electron affinities of noble gases.

Explanation

**Step-by-Step Solution:**

1. **Definition of Electron Affinity:**
- Electron affinity is defined as the amount of energy released when an electron is added to an isolated gaseous atom. This process can be represented as:
\[ \text{A(g)} + e^- \rightarrow \text{A}^-(g) + \text{Energy} \]

2. **Understanding Noble Gases:**
- Noble gases have a general electronic configuration of \( \text{Ns}^2\text{Np}^6 \). This means their outermost shell is completely filled with 8 electrons (except for Helium, which has 2 electrons in its outer shell).
...