A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · May/June 2023 · Q401 Mark

The diagram shows the relative abundance of different isotopes of lead in a sample of lead ore. The abundance of 208 is half that of 206. The abundances of 208 and 209 are equal. [Figure of bar chart showing % abundance vs Ar for isotopes 206, 207, 208, 209]

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A207.00

B207.25

C207.50

D207.67

✓ Correct answer

B: 207.25

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Topic: Atoms, molecules and stoichiometry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2023 Paper 1 Variant 2, question 40.

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The diagram shows the relative abundance of different isotopes of lead in a sample of lead ore. The abundance of 208 is half that of 206. The abundances of 208 and 209 are equal. [Figure of bar chart showing % abundance vs Ar for isotopes 206, 207, 208, 209]

✓ Correct answer

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