Draw the structure of
$(i)$ $BeCl_2$ (vapour)
$(ii)$ $BeCl_2$ (solid).

(N/A) $(i)$ In the vapour state,$BeCl_2$ exists as a monomer with a linear structure: $Cl-Be-Cl$.
$(ii)$ In the solid state,$BeCl_2$ exists as a polymeric chain structure where $Be$ atoms are linked by chlorine bridges.