CAIE A Level Chemistry 9701 · Atoms, molecules and stoichiometry
Chlorine exists as a mixture of isotopes, and chlorine gas consists of diatomic molecules. Describe what is meant by each of the following terms, using the unified atomic mass unit in your definitions.
6 marks, so the mark scheme is looking for about 6 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.