A Level Chemistry 9701/22/F/M/16 Q1

Question

1 This question is about Period 3 elements and their compounds.
(a) Give an explanation for each of the following statements.
(i) The atomic radius decreases across Period 3 (Na to Ar).
(ii) The first ionisation energy of sulfur is lower than that of phosphorus.
(iii) Sodium is a better electrical conductor than phosphorus.
(iv) Magnesium is a better electrical conductor than sodium.
(b) The flow chart below shows a series of reactions
(i) Give the formula of each of the compounds A to D.
(ii) E reacts with dilute aqueous acid to produce a gas that turns limewater cloudy. Suggest the identity of reagent X.

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    2021-03-27T16:25:00+08:00

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