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Q.

The energy of the ‘2s’ orbital is highest in

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a

K

b

Na

c

Li

d

H

answer is D.

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Detailed Solution

Hydrogen Atom has the 2s orbital with the highest energy because hydrogen is not able to access its 2s state so it possesses an excited state. Hence, it has the highest energy.

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The energy of the ‘2s’ orbital is highest in