Chemistry · May / June 2026 · Paper 12 · Question 3
5070Isotopes
Which number is different for two isotopes of the same element?
- Athe number of outer-shell electrons in each atom
- Bthe total number of electrons in each atom
- Cthe number of neutrons in each atom
- Dthe number of protons in each atom
As printed in the paper
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Correct answer: C. the number of neutrons in each atom
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