Which atom has the correct ground state electron configuration?

C l : [N e] 3 s^{1} 3 p^{6}

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M o : [K r] 5 s^{1} 4 d^{5}

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C u : [A r] 4 s^{2} 3 d^{6}

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A s : [A r] 4 s^{1} 4 d^{10} 4 p^{3}

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Solution

The correct option is B $M o : [K r] 5 s^{1} 4 d^{5}$
The option (B) is the correct answer.
$M o : [K r] 5 s^{1} 4 d^{5}$
has the correct ground state electron configuration.
The correct ground state electron configurations of other elements are given below.
$C l : [N e] 3 s^{2} 3 p^{5}$
$A s : [A r] 4 s^{2} 3 d^{10} 4 p^{3}$
$C u : [A r] 4 s^{1} 3 d^{9}$

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Similar questions

[A r] 4 s^{1} 3 d^{10}

[A r] 4 s^{2} 3 d^{9}

n s^{2}

The correct ground state configuration of Kr is:

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