(a(i))[2]
Give an explanation for the statement: Across Period 3 (Na to Ar), the atomic radius decreases.
(a(ii))[2]
Give an explanation for the statement: Sulfur has a lower first ionisation energy than phosphorus.
(a(iii))[2]
Give an explanation for the statement: Sodium conducts electricity better than phosphorus.
(a(iv))[1]
Give an explanation for the statement: Magnesium conducts electricity better than sodium.
(b(i))[4]
A sequence of reactions is shown in the flow chart. Give the formula of each compound from A to D.
(b(ii))[1]
E reacts with dilute aqueous acid to produce a gas that turns limewater cloudy. Suggest the identity of reagent X.