\(\quad\quad\quad\quad\quad\quad{Mg}\) \(\quad\quad{Al}\) \(\quad\quad\quad{P}\) \(\quad\quad\quad{S}\)
Valence \(\left[{N}_{{e}}\right]: 3 {~s}^{2}\) \(\quad3 {~s}^{2} 3 {p}^{1}\) \(\quad3 {~s}^{2} 3 {p}^{3} \quad3 {~s}^{2} 3 {p}^{4}\)
\(\quad\quad\quad\quad\quad\quad\uparrow\) \(\quad\quad\quad\quad\quad\quad\uparrow\)
\(\quad\quad\quad\quad\quad\)Full Filled Stable \(\quad\)Half Filled Stable
$(i)$ $Be^+ > Be$ $(ii)$ $Be > Be^+$ $(iii)$ $C > Be$ $(iv)$ $B > Be$