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Physics (AS & A Level) · Feb / March 2020 · Paper 12 · Question 39

9702Atoms, nuclei and radiation

The equation represents the decay of a nucleus X to a nucleus Y. \[^{A}_{Z}\text{X} \rightarrow \ ^{A}_{Z-1}\text{Y} + p + q\] What are particles p and q?

  1. Ap: β– particle, q: neutron
  2. Bp: β– particle, q: proton
  3. Cp: β+ particle, q: antineutrino
  4. Dp: β+ particle, q: neutrino

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Correct answer: D. p: β+ particle, q: neutrino

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