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Nomenclature of Coordination Compounds

The electroni...

Question

The electronic configuration of valence shell of $C u$ is:

3 d^{10} 4 s^{2}

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3 d^{9} 4 s^{2}

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3 d^{10} 4 s^{1}

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3 d^{10} 4 s^{0}

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Solution

The correct option is C $3 d^{10} 4 s^{1}$
Configuration with completely filled and half filled orbitals have extra stability. In $3 d^{10} 4 s^{1}$ , d- orbitals are completely filled and s-orbital is half filled. Hence, it is a more stable configuration so Cu has an exceptional configuration.

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C r^{2 +}

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3 d^{5} 4 s^{1}

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3 d^{10} 4 s^{1}

3 d^{9} 4 s^{2}

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The valence shell electronic configuration of group 18 element is:

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

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