Stable electronic configuration of a transition metal is- 1s-2 2s-22p-6 3s-2 3p-6 3d-9 4s-2- 1s-2 2s-2 2p-6 3s-2 3p-6 4s-2 3d-5- 1s-2 2s-2 2p-6 3s-2 3p-6 4s-2- 1s-2 2s-2 2p-6 3s-2 3p-6 4s-2 3d-10 4p-6-

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Electronic Configuration of Actinides

Stable electr...

Question

Stable electronic configuration of a transition metal is:

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{9} 4 s^{2}

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{5}

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{10} 4 p^{6}

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Solution

The correct option is B $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{5}$
Generally, the elements having half-filled and completely filled outer electronic configurations are stable elements.

Here in given options the configuration: $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{5}$ contains half filled outer electronic configuration $(3 d^{5})$ .

Hence option B is correct.

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Sir/Madam

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Q. Electrons are speed throughout the atom on different levels and subshells. The electron configuration for calcium is:

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Q. Two elements X and Y have the following electronic configurations

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. The formula of the compound formed by the combination of X and Y is :

Q. The general electronic configuration of transition metals is:

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