The second ionization enthalpy of calcium is more than that the first and yet calcium forms `CaCl_(2)` and not CaCl. Why ?

Explanation

To understand why calcium forms CaCl₂ instead of CaCl despite the second ionization enthalpy of calcium being higher than the first, we can break down the reasoning into several steps:

### Step-by-Step Solution:

1. **Understanding Ionization Energies**:
- The first ionization enthalpy of calcium (Ca) is the energy required to remove one electron from a neutral calcium atom to form Ca⁺.
- The second ionization enthalpy is the energy required to remove a second electron from Ca⁺ to form Ca²⁺.

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