Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub

$\mathrm{Fe}(26)1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}3{\mathrm{d}}^{6}4{\mathrm{s}}^2$

i.e. no electron is present in d-subshell of outer most shell.