Chemistry - Complete d-block Question with Solution | TestHub

${\mathrm{Fe}}^{2+}(24)=[\mathrm{Ar}]3d^{6}4s^0$ It has 4 unpaired electrons ${\mathrm{Cu}}^{+}(28)=[\mathrm{Ar}]3d^{10}4s^0$ It has 0 unpaired electron $\mathrm{Zn}(30)=[\mathrm{Ar}]3d^{10}4s^2$ It has 0 unpaired electron ${\mathrm{Ni}}^{3+}(25)=[\mathrm{Ar}]3d^{7}4s^0$ It has 3 unpaired electrons