Compare the size of (a) Na atom with `Na^(+)` ion (b) Cl atom with `Cl^(-)` ion

Explanation

To compare the sizes of the sodium atom (Na) with the sodium ion (Na⁺) and the chlorine atom (Cl) with the chloride ion (Cl⁻), we can follow these steps:

### Step-by-Step Solution:

**(a) Comparing Na atom with Na⁺ ion:**

1. **Understanding the Electron Configuration:**
- Sodium (Na) has an atomic number of 11, which means it has 11 electrons. Its electron configuration is 1s² 2s² 2p⁶ 3s¹.
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