Electronic confriguration of a transition element X in +3 oxidation states is `[Ar]3d^(5)`.
What is its atomic number?

Options

A. 25
B. 26
C. 27
D. 24

Answer

B

Explanation

`X^(3+) = [Ar]^(18) 3d^(5) = 23 ` electrons . As `X^(3+)` is formed by loss of 3 electrons from X,X will have 26 electrons. `:. `At. No. of X = 26