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Physics (AS & A Level) · May / June 2026 · Paper 14 · Question 40

9702Atoms, nuclei and radiation

The nuclei of the isotopes of an element all contain the same number of a certain particle. What is this particle?

  1. Aelectron
  2. Bneutron
  3. Cnucleon
  4. Dproton

As printed in the paper

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Correct answer: D. proton

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