Chemistry - Complete d-block Question with Solution | TestHub

The electronic configuration of Mn is $[Ar]3d^{5}4s^2$.

It has the maximum number of unpaired electrons in the $3d$ subshell among the given elements.

Due to the involvement of all $3d$ and $4s$ electrons in bond formation, Mn exhibits the highest number of oxidation states, ranging from $+2$ to $+7$ ($+2,+3,+4,+5,+6,+7$).

Answer: Mn