(a(i))[1]
State the type of bonding found in magnesium and in sodium chloride. bonding shown in magnesium bonding shown in sodium chloride
(a(ii))[1]
Explain the difference in the melting points of magnesium and sodium chloride.
(a(iii))[2]
Explain the difference in the melting points of phosphorus and sulfur in terms of structure and bonding.
(b(i))[1]
Define electronegativity.
(b(ii))[2]
Explain why electronegativity increases across a period.
(b(iii))[1]
Name the strongest intermolecular force that is present between $\text{NH}_3(l)$ molecules.
(b(iv))[2]
Draw a diagram to show the formation of the strongest intermolecular force between two molecules of $\text{NH}_3(l)$. Show any relevant lone pairs of electrons and dipoles.
(b(v))[2]
Table 1.2 shows the melting points of ice and ammonia. Suggest two reasons why they differ.