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Q.

The electronic configuration of Zr is

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a

[K r] 5 s^{2} 4 d^{2}

b

[K r] 5 s^{2} 4 d^{3}

c

[K r] 5 s^{1} 4 d^{3}

d

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

answer is A.

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Detailed Solution

The total number of electrons present in neutral Zr is 40. So, the electronic configuration of Zr is

[K r] 5 s^{2} 4 d^{2}

. Here, [Kr] indicates that it has 36 electrons with inert gas configuration.

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