What is the molecular formula of aluminium chloride ?

Explanation

To determine the molecular formula of aluminium chloride, we can follow these steps:

### Step 1: Identify the atomic number of Aluminium
Aluminium (Al) has an atomic number of 13. This means it has 13 electrons.

### Step 2: Write the electronic configuration of Aluminium
The electronic configuration of Aluminium is:
- 1s² 2s² 2p⁶ 3s² 3p¹
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