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Physics (AS & A Level) · Oct / Nov 2025 · Paper 12 · Question 39

9702Atoms, nuclei and radiation

A nucleus of magnesium-23 decays to form a nucleus of sodium-23, emitting a β⁺ particle and particle X. What is particle X?

  1. Aan antineutrino
  2. Ban electron
  3. Ca neutron
  4. Da neutrino

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Correct answer: D. a neutrino

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