Electrolytes are compounds containing

Consider the Born-Haber cycle for the formation of an ionic compound given below and identify the compound $Z$ formed.
$M_{(s)}$ $\xrightarrow{\Delta H_1} M_{(g)}$ $\xrightarrow{\Delta H_2} M^{+}_{(g)}$
$\frac{1}{2} X_{2(g)}$ $\xrightarrow{\Delta H_3} X_{(g)}$ $\xrightarrow{\Delta H_4} X^{-}_{(g)}$
$M^{+}_{(g)} + X^{-}_{(g)} \xrightarrow{\Delta H_5} Z$

Write Lewis symbols for the following atoms and ions:
$S$ and $S^{2-}$; $Al$ and $Al^{3+}$; $H$ and $H^{-}$

Write Lewis symbols for the following atoms and ions: $S$ and $S^{2-}$,$Al$ and $Al^{3+}$,$H$ and $H^{+}$.

Which pair of atoms forms the strongest ionic bond?

Which among the following compounds shows the highest lattice energy?