Write the highest oxidation state shown by an element with atomic number $23$.

 Name the metal with tripositive ion represented by the configuration : $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}3{\mathrm{d}}^3$