Chemistry · Oct / Nov 2022 · Paper 11 · Question 7
5070Isotopes
The element chlorine has two isotopes, ^{35}_{17}Cl and ^{37}_{17}Cl. In the Periodic Table, chlorine is shown as ^{35.5}_{17}Cl. Which row shows the correct percentage of each isotope in a sample of naturally occurring chlorine?
- A25, 75
- B40, 60
- C50, 50
- D75, 25
As printed in the paper
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Correct answer: D. 75, 25
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