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Electronic Configuration

An inert gas ...

Question

An inert gas with more than one orbit, has ____ electrons in its outermost shell.

A

0

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B

2

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C

4

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D

8

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Solution

The correct option is C 8
Helium $=$ 2 ; Neon $=$ 2,8 ; Argon $=$ 2,8,8 ; Krypton $=$ 2,8,18,8 ; Xenon $=$ 2,8,18,18,8 ; Radon $=$ 2,8,18,32,18,8. All have completely filled electrons with valence electron 8.

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