(a(i))[2]
Give two physical properties shared by all metals.
(a(ii))[1]
Give one physical property of Group I metals that differs from most other metals, and say how it differs.
(b)[2]
Complete the chemical equation for this reaction. $\ldots\text{Na} + \text{O}_2 \rightarrow \ldots\text{Na}_2\text{O}$
(c(i))[2]
Complete the diagram by naming the electrolyte and the cathode for the electrolysis of molten sodium iodide.
(c(ii))[2]
Name the substances produced at each electrode during the electrolysis of molten sodium iodide.
(d)[2]
Complete the table to work out the relative molecular mass of $\text{Na}_2\text{S}_2\text{O}_3$.