(a(i))[4]
Complete the table, using only the words increases, decreases or no change.
(a(ii))[1]
State what conclusion can be drawn from this.
(b)[2]
Complete the dot-and-cross diagram to represent the electron arrangement in a molecule of phosphorus(III) chloride, $\text{PCl}_3$. Show outer-shell electrons only.
(c)[2]
Write a chemical equation for the reaction of phosphorus(V) chloride with phosphorus(V) oxide.
(d)[2]
Calculate the empirical formula of compound X.
(e)[1]
Deduce the molecular formula of compound Y.