A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · Oct/Nov 2009 · Q301 Mark

An element X consists of four isotopes. The mass spectrum of X is shown in the diagram. [Figure 30.1] What is the relative atomic mass of X?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A91.00

B91.30

C91.75

D92.00

✓ Correct answer

B: 91.30

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Topic: Atoms, molecules and stoichiometry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2009 Paper 1 Variant 2, question 30.

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