Chemistry - Complete d-block Question with Solution | TestHub

$\mathrm{M}\mathrm{n}$had outer electronic configuration as$4{\mathrm{s}}^2\mathrm{}3{\mathrm{d}}^5$, first two electrons are removed from$4\mathrm{S}-$orbital, but the removal of$3^{\mathrm{r}\mathrm{d}}$electron is from half filled$3\mathrm{d}-$orbital, which requires higher ionization energy then other metal.