A-LevelPhysicsNuclear physics9702/12 · May/June 2024 · Q371 Mark
Nuclide X with proton number Z undergoes β⁺ decay to form nuclide Y. The decay may be represented by the equation shown. X → Y + β⁺ + W What is the proton number of Y and which particle is represented by the symbol W? proton number of Y, particle represented by W Z−1, antineutrino Z−1, neutrino Z+1, antineutrino Z+1, neutrino
AZ−1, antineutrino
BZ−1, neutrino
CZ+1, antineutrino
DZ+1, neutrino
✓ Correct answer
B: Z−1, neutrino
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