(a)[3]
Complete the table to show how many unpaired electrons are in the outer shell of each gaseous atom from Na to Ar.
(b(i))[3]
Complete the table for the reactions of two Period 3 chlorides with water, $\text{SiCl}_4$ and $\text{PCl}_5$, and include the observations and the pH of the solution formed.
(b(ii))[1]
Write an equation to show the reaction between $\text{SiCl}_4$ and $\text{H}_2\text{O}$.