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Q.

The valence electron configuration of an element with atomic number 23 is

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a

3d3 4s2

b

3d2 4s2 4p1

c

3d5

d

3d2 4s1 4p1

answer is B.

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Detailed Solution

The valence electron configuration of an element with atomic number 23 is= [Ar] 3d3 4s2

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