O-LevelChemistryAtomic Structure5070/11 · Oct/Nov 2022 · Q71 Mark

The element chlorine has two isotopes, ³⁵₁₇Cl and ³⁷₁₇Cl. In the Periodic Table, chlorine is shown as ³⁵·⁵₁₇Cl. Which row shows the correct percentage of each isotope in a sample of naturally occurring chlorine?

A25 75

B40 60

C50 50

D75 25

✓ Correct answer

D: 75 25

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2022 Paper 1 Variant 1, question 7.

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