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Physics (AS & A Level) · May / June 2023 · Paper 13 · Question 39

9702Atoms, nuclei and radiation

Which statement about β– decay is correct?

  1. AA neutron changes to a proton in the nucleus and an electron and an antineutrino are emitted.
  2. BA neutron changes to a proton in the nucleus and an electron and a neutrino are emitted.
  3. CA proton changes to a neutron in the nucleus and an electron and an antineutrino are emitted.
  4. DA proton changes to a neutron in the nucleus and an electron and a neutrino are emitted.

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Correct answer: A. A neutron changes to a proton in the nucleus and an electron and an antineutrino are emitted.

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