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Q.

The electronic configuration of Nb  is

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a

[Kr]5s24d3

b

[Kr]5s24d2

c

[Kr]5s24d4

d

[Kr]5s14d4

answer is A.

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Detailed Solution

The total number of electrons present in a neutral atom of Nb  is 41. So the electronic configuration of Nb  is [Kr]5s14d4 . Here, [Kr] indicates that it has 36 electrons with inert gas configuration.
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