A-LevelPhysicsNuclear physics9702/12 · May/June 2011 · Q391 Mark
The uranium nucleus ²³⁸U undergoes α-decay, producing nucleus X. Nucleus X undergoes β-decay, producing nucleus Y. For nucleus Y, what are the values of the proton number and nucleon number?
Aproton number: 89, nucleon number: 234
Bproton number: 89, nucleon number: 236
Cproton number: 91, nucleon number: 234
Dproton number: 91, nucleon number: 236
✓ Correct answer
C: proton number: 91, nucleon number: 234
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