Calculate the electronegativity value of chlorine on Mulliken's scale, given that `IP = 13.0 eV` and `EA = 4.0 eV`.

Explanation

To calculate the electronegativity value of chlorine on Mulliken's scale, we will follow these steps:

### Step 1: Understand the formula for Mulliken's electronegativity
The formula for calculating electronegativity (χ) on Mulliken's scale is given by:
\[ \chi = \frac{IP + EA}{2} \]
where:
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