CAIE A Level Chemistry 9701 · The Periodic Table: chemical periodicity
Compare the physical properties of sodium and chlorine, two elements in Period 3.
In your answer, refer to:
Explain the differences in melting point and electrical conductivity in terms of the structure and bonding of these elements.
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.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.