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Electronic Configuration

The total num...

Question

The total number of electrons having m = 0 in potassium atom is

A

11

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B

9

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C

6

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D

10

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Solution

The correct option is A
11

Electronic configuration of K : $1 s^{2} 2 s^{2} 2 p 63 s^{2} 3 p^{6} 4 s^{1}$

For all ‘s’ electrons m = 0 (7 e)

For 2 electrons each of ‘p’ subshell m = 0 (4 e) Total = 11 e

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