Question

An element has$\left[Ar\right]3d^4$ configuration in its +3 oxidation state. The atomic number of element is:

• A. 25
• B. 26
• C. 22
• D. 19

Answer 1

The correct option is A 25

Element have electronic configuration of $\left[Ar\right]3d^4$ in its +3 oxidation state.

Thus, neutral electronic configuration of element will be $\left[Ar\right]3d^{5}4s^2$.

Thus the atomic number of the element will be 25.