CAIE A Level Chemistry 9701 · Atoms, molecules and stoichiometry
A student is studying the properties of neon gas and carbon dioxide gas. They want to understand how the masses of atoms and molecules are described.
Compare the terms 'relative atomic mass' and 'relative molecular mass', and explain how each relates to the unified atomic mass unit. Use neon and carbon dioxide as examples in your answer.
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.