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Physics (AS & A Level) · May / June 2025 · Paper 12 · Question 38

9702Atoms, nuclei and radiation

Two neutral atoms are isotopes of the same element. Which statement about the atoms is correct?

  1. AThey have a different number of neutrons and a different number of electrons.
  2. BThey have a different number of neutrons and the same number of protons.
  3. CThey have the same number of neutrons and a different number of electrons.
  4. DThey have the same number of neutrons and the same number of protons.

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Correct answer: B. They have a different number of neutrons and the same number of protons.

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