Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub

${}_{26}{\mathrm{Fe}}^{2+}{\Rightarrow }_{18}\left[\mathrm{Ar}\right]\mathrm{ }3{\mathrm{d}}^6\mathrm{ }; 6 \mathrm{d}$-electrons

${}_{17}\mathrm{Cl}\Rightarrow 1{\mathrm{s}}^2\mathrm{ }2{\mathrm{s}}^2\mathrm{ }2{\mathrm{p}}^6\mathrm{ }3{\mathrm{s}}^2\mathrm{ }3{\mathrm{p}}^5\mathrm{ }; 11 \mathrm{p}$-electrons

$\mathrm{Mg}=1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^2 ; 6 \mathrm{s}$-electrons

$\mathrm{d}$-electrons in$\mathrm{Fe}={}_{18}\mathrm{Ar}3{\mathrm{d}}^6=6$

$\mathrm{p}$-electrons in$\mathrm{Ne}=1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^6=6$