Why the first ionisation energy of carbon atom is greater than that of boron atom whereas, the reverse is true for the second ionisation energy.

Explanation

To understand why the first ionization energy of carbon is greater than that of boron, while the reverse is true for the second ionization energy, we can analyze the electronic configurations and the stability of the resulting ions after ionization.

### Step-by-Step Solution:

1. **Identify the Electronic Configurations:**
- Carbon (C) has the electronic configuration: \(1s^2 2s^2 2p^2\).
- Boron (B) has the electronic configuration: \(1s^2 2s^2 2p^1\).

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