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?
A
Valence principal quantum number (n)
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B
Nuclear charge
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C
Nuclear mass
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D
Number of core electrons
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Solution
The correct option is C Nuclear mass Nuclear mass does not affect the valence shell because nucleus consists of protons and neutrons. Protons i.e., nuclear charge affect the valence shell but neutrons do not.