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Introduction to Noble Gases

The number of...

Question

The number of valence electrons present in noble gases is:

A

6

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B

18

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C

8

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D

4

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Solution

The correct option is C $8$
The number of valence electrons present in noble gases is 8.
For example the noble gas with atomic number 18 has electronic configuration $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$ . Since it has completed its octet, it is stable and least reactive.

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