Question

Draw the dot and cross structure of the following:

An ionic compound formed when Mg reacts with the dilute HCl.

[Atomic number: Mg = 12, Cl = 17, H = 1, N = 7]

Answer 1

Ionic compound formed when Mg reacts with dilute HCl is MgCl₂.

Dot and cross structure of MgCl₂:

\[\begin{array}{cc}
\phantom{..}\ce{\text{}^\text{x}}\phantom{..}\ce{\overset{\text{x}\phantom{.}\text{x}}{\underset{\text{x}\phantom{.}\text{x}}{Cl}}}\phantom{..}\ce{\text{}^\text{x}_\text{x}}\phantom{....................................}\\
\phantom{}/\phantom{................................................}\\
\phantom{}\ce{\text{Mg:} \phantom{............} -> {[\text{Mg}]^{2+} + 2[\phantom{..}\ce{\text{}^\bullet_\text{x}}\phantom{..}\ce{\overset{\text{x}\phantom{.}\text{x}}{\underset{\text{x}\phantom{.}\text{x}}{Cl}}}\phantom{..}\ce{\text{}^\text{x}_\text{x}}\phantom{..}]^{-}}}\\
\phantom{}\backslash\phantom{................................................}\\
\phantom{..}\ce{\text{}_\text{x}}\phantom{..}\ce{\overset{\text{x}\phantom{.}\text{x}}{\underset{\text{x}\phantom{.}\text{x}}{Cl}}}\phantom{..}\ce{\text{}^\text{x}_\text{x}}\phantom{...................................}\\
\end{array}\]