Compare5 marksStandard
Sodium, magnesium, aluminium and sulfur are elements in Period 3.
Compare the melting points of these four elements, and explain the differences in terms of their structure and bonding.
CAIE A Level Chemistry 9701 · The Periodic Table: chemical periodicity
The Periodic Table: chemical periodicity: compare question
How this question is marked
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
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