Why does ozone have a bond angle less than `120^(@)` ?

Explanation

To understand why ozone (O₃) has a bond angle less than 120 degrees, we can break down the explanation into several steps:

### Step 1: Structure of Ozone
Ozone (O₃) consists of three oxygen atoms. The central oxygen atom is bonded to two other oxygen atoms: one through a double bond and the other through a single bond. This can be represented as:
- O=O (double bond)
- O-O (single bond)

### Step 2: Valence Electrons
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