Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell ?

Options

A. Valence principal quantum number (n)
B. Nuclear charge (Z )
C. Nuclear mass
D. Number of core electrons.

Explanation

To solve the question regarding which factor does not affect the valence shell of an element, we will analyze each option provided in the question step by step.

### Step 1: Understand the Valence Shell
The valence shell is the outermost shell of an atom that contains the valence electrons. These electrons are crucial in determining the chemical properties and reactivity of the element.

**Hint:** Remember that the valence shell is where the outermost electrons reside.

### Step 2: Analyze the Options
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