Answer
The metal is Iron [Fe].
Work Step by Step
Let the metal ion be $M^{+3}$; it contain 5 electrons in the 3d shell. The electronic configuration of $M^{+3}$ is $1s^{2} 2s^{2}2p^{6} 3s^{2}3p^{6}3d^{5}$.
If there are 3d orbitals, the valence shell will be 4s. It’s parent metal is the one with 3 more electrons, and it is added in 4s and 3d orbital as the electrons are removed from the valence shell and then from the penultimate shell.
Therefore, electronic configuration of M is $1s^{2} 2s^{2}2p^{6} 3s^{2}3p^{6}4s^{2}3d^{6}$
or $[Ar] 4s^{2}3d^{6}$.
The atomic number of the element is 26, and the metal is iron [Fe].
