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Electronic Configuration

Which of the ...

Question

Which of the following noble gas does not have an octet of electrons in the outermost shell?

A

He

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B

Rn

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C

Ar

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D

Ne

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Solution

The correct option is A He
$H e$ element has configuration $2 s^{2}$

It does not have an octet of electrons in the outermost shell.

Option A is correct.

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