Compare5 marksStandard
A sample of carbon contains 99% carbon-12 atoms and 1% carbon-13 atoms.
Compare the relative isotopic mass of one carbon-13 atom with the relative atomic mass of carbon in this sample.
CAIE A Level Chemistry 9701 · Atoms, molecules and stoichiometry
Atoms, molecules and stoichiometry: 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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