From the electronic configurations Na (2, 8, 1), Mg (2, 8, 2) and Al (2, 8, 3), answer the following questions:
Which element is the most reactive?

Explanation

To determine which element is the most reactive among sodium (Na), magnesium (Mg), and aluminum (Al) based on their electronic configurations, we can follow these steps:

### Step 1: Analyze the Electronic Configurations
- Sodium (Na): 1s² 2s² 2p⁶ 3s¹ (2, 8, 1)
- Magnesium (Mg): 1s² 2s² 2p⁶ 3s² (2, 8, 2)
- Aluminum (Al): 1s² 2s² 2p⁶ 3s² 3p¹ (2, 8, 3)

### Step 2: Identify Valence Electrons
...