Give reason for the following :
The molecule of ` MgCl_(2)` is linear while that of stannous chloride is angular.

Explanation

To explain why the molecule of MgCl₂ is linear while that of stannous chloride (SnCl₂) is angular, we can break down the reasoning into several steps:

### Step 1: Understanding the Electronic Configuration
- **Magnesium (Mg)** has an atomic number of 12, with the electronic configuration of 1s² 2s² 2p⁶ 3s². It has 2 valence electrons in the 3s orbital.
- **Chlorine (Cl)** has an atomic number of 17, with the electronic configuration of 1s² 2s² 2p⁶ 3s² 3p⁵. It has 7 valence electrons and needs 1 more electron to complete its octet.

### Step 2: Bond Formation in MgCl₂
- Magnesium donates its two valence electrons to two chlorine atoms, forming two Mg-Cl bonds.
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