CAIE A Level Chemistry 9701 · Atomic structure
Chlorine exists as two stable isotopes: chlorine-35 and chlorine-37.
Compare the chemical and physical properties of these two isotopes. In your answer you should refer to the numbers of subatomic particles in each isotope and explain the reasons for any similarities or differences.
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.