The valence electron configuration of an element with atomic number 23

1.	The valence electron configuration of an element with atomic number 23 is
Answer» `3D^(5)` `3d^(3) 4S^(2)` `3d^(2) 4s^(1) 4p^(1)` `3d^(2)4s^(2) 4p^(1)` Answer :B

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