Which two elements have only one electron shell (n=1) when in their lowest energy state? H...

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Which two elements have only one electron shell (n=1) when in their lowest energy state? H and Na H and He He and Li He and A

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Answer 1

Answer #1

Element	Atomic number	electronic configuration
H	1
He	2
Na	11
Li	3
Ar	18

Out of all of these we can see that H and He has one Electron shell.

Ans: H and He

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Answer 2

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