Select the correct alternative from the choices given:

Among the following the one which is composed of all the three kinds of bond (ionic, covalent and coordinate bond) is:

 

The element ${}_{17}\mathrm{Cl}$ combines with ${}_1\mathrm{H}$ to form hydrogen chloride, a covalent compound. Illustrate this by electron dot diagrams.

(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?