Compare qualitatively the first and second ionisation potentials of copper and zinc. Explain the observation.

Explanation

To compare the first and second ionization potentials of copper (Cu) and zinc (Zn), we will analyze their electronic configurations and the implications of these configurations on ionization energy.

### Step-by-Step Solution:

1. **Identify the Electronic Configurations**:
- **Copper (Cu)**: Atomic number = 29
- Electronic configuration: \( \text{[Ar]} \, 3d^{10} \, 4s^1 \)
- **Zinc (Zn)**: Atomic number = 30
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