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Physics (AS & A Level) · Feb / March 2024 · Paper 12 · Question 40

9702Fundamental particles

A nucleus of carbon-10, ¹⁰₆C, decays by beta-emission to form a nucleus of boron-10, ¹⁰₅B. For this decay process, what is the change to a nucleon and what is the change in the quark composition of the nucleon?

  1. Aproton to neutron; down becomes up
  2. Bproton to neutron; up becomes down
  3. Cneutron to proton; down becomes up
  4. Dneutron to proton; up becomes down

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Correct answer: B. proton to neutron; up becomes down

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