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Modern Periodic Table

Among the ele...

Question

Among the elements from atomic number $1$ to $36$ , the number of elements which have and unpaired electron in their $s$ -subshell is :

A

7

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B

9

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C

4

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D

6

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Solution

The correct option is D $6$
$H, L i, N a, K, C r, C u$ has one unpaired electron in their $s$ orbital.

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