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17 8 This question is about the reaction of halogens with alkali metals. (a)

Astatine reacts with potassium. Construct the word equation for this reaction.

................................................................................................................................................ [1]

(b)

Chlorine reacts with sodium to make sodium chloride. The electronic structure for chlorine is 2.8.7. Use the ‘dot and cross model’ to describe the bonding in sodium chloride and in a molecule of chlorine. You only need to include the outer shell electrons.

(i) sodium chloride

[2]

(ii) chlorine

[1] [Total: 4]

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C4 question 8