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In which of the following energy of 2s o...

In which of the following energy of 2s orbital minium

A

K

B

Li

C

Na

D

H

Text Solution

Verified by Experts

The correct Answer is:
A
Energy of 2s orbital `prop (1)/((Z_("eff"))^(2))," "Z_("eff"):K=Na gt Li gt H &Z:K gt Na`
hence the force of attraction of the K nuclei at 2s electrons will be stronger than that of Na nuclei.
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