Give one property of ${\mathrm{MgCl}}_2$ which agrees with it being an ionic compound.

(a) Name two compounds that are covalent when pure but produce ions when dissolved in water.

(b) For each compound give the formulae of ions formed in aqueous solution.

What is the difference between sodium atom and sodium ion?

By means of simple diagram explain the formation of sodium chloride.

By means of simple diagrams explain the formation of carbon tetrachloride.

If $\mathrm{A},\mathrm{B},\mathrm{C}$ and $\mathrm{D}$ are elements given that $\mathrm{B}$ is an inert gas (not helium)

What type of bonding would take place between (i) $\mathrm{A}$ and $\mathrm{C}$ and (ii) $\mathrm{D}$ and $\mathrm{A}$.