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  • Correct valence shell electronic configuration of the given element is correctly represented in Option: 1 <img alt="K=4s^{1}, Cr=3d^{4}4s^{

Correct valence shell electronic configuration of the given element is correctly represented in 

Option: 1

K=4s^{1}, Cr=3d^{4}4s^{2}, Cu=3d^{10}4s^{2}


Option: 2

K=4s^{2}, Cr=3d^{4}4s^{2}, Cu=3d^{10}4s^{2}


Option: 3

K=4s^{2}, Cr=3d^{5}4s^{1}, Cu=3d^{10}4s^{2}


Option: 4

K=4s^{1}, Cr=3d^{5}4s^{1}, Cu=3d^{10}4s^{1}


Answers (1)

best_answer

The correct configurations are given as 

K(19) : [Ar]4s^1

Cr(24) : [Ar]4s^13d^5

Cu(29) : [Ar]4s^13d^{10}

The anomalous configuration of Cr and Cu is attributed to the extra stability of the half filled and the fully filled d orbital configuration respectively

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Pankaj

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