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Chemical Formulae

Which of the ...

Question

Which of the following elements does not have ${n p}^{6}$ electronic configuration?
Where n represents number of orbit.

A

Argon

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B

Krypton

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C

Helium

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D

Xenon

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Solution

The correct option is C Helium
Neon,Argon,Xenon,Krypton,Radon has $n p^{6}$ electronic configuration where as Helium has ${n s}^{2}$ electronic configuration.

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