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

Electronic configuration of `X^(3+) ` is `[Ar]3d^(5)`
It repersents the total number of `e^(Theta)` and oxidation state.
Therefore, atomic number of X = 18 + 5 + 3 = 26
Hence, option (b) is correct.