Compare the metallic bond strengths in Mg, `Ca and AI.`

Explanation

To compare the metallic bond strengths in magnesium (Mg), calcium (Ca), and aluminum (Al), we can follow these steps:

### Step 1: Identify the Valence Electrons
- Magnesium (Mg) has 2 valence electrons.
- Calcium (Ca) also has 2 valence electrons.
- Aluminum (Al) has 3 valence electrons.

### Step 2: Understand the Role of Valence Electrons
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