Give a reason why the melting point of sodium chloride is much higher than that of carbon tetrachloride.

Why does hydrogen chloride gas not conduct electricity, while its aqueous solution does?

What is a covalent bond? Give one example each of a single, a double and a triple covalent bond.

State three differences between electrovalent and covalent compounds.

What is a co-ordinate bond? Give one example.

Explain the formation of magnesium chloride from its atoms, showing the transfer of electrons.

Draw the electron dot structure of a molecule of methane and of ammonia, and state the number of lone pairs in each.