A) In ClF $_{3}$, Cl: $[\mathrm{Ne}] 3 \mathrm{s}^{2} 3 \mathrm{p}^{5} ;$ Cl has 10 electrons in ultimate shell and $7 \mathrm{e}^{-}$ in valence shell.
B) In $\mathrm{P} \mathrm{Cl}_{5}, \mathrm{P}:[\mathrm{Ne}] 3 \mathrm{s}^{2} 3 \mathrm{p}^{3} ; \mathrm{P}$ has 10 electrons in ultimate shell and $5 \mathrm{e}^{-}$ in valence shell.
C) In $\mathrm{IF}_{7}, \mathrm{I}:[\mathrm{Kr}] 5 \mathrm{s}^{2} 4 \mathrm{d}^{10} 5 \mathrm{p}^{5} ; \mathrm{I}$ has 14 electrons in ultimate shell and $7 \mathrm{e}^{-}$ in valence shell.
$Al_2Cl_6$ $-$ $Al_2(CH_3)_6$ $-$ $AlF_3$ $-$ $BeCl_2$નો ડાઇમર $-$ $BeH_2$નો ડાઇમર
(Note : સંપૂર્ણ અષ્ટક માટે $C$ અને અપૂર્ણ અષ્ટક માટે $IC$)