A-LevelPhysicsNuclear physics9702/12 · May/June 2014 · Q381 Mark

A nucleus X decays into a nucleus Y by emitting an alpha particle followed by two beta particles. Which statement about this nuclear decay is correct?

ABeta particle decay occurs when a proton changes into a neutron.

BNucleus Y has the same nucleon number as nucleus X.

CNucleus Y is an isotope of nucleus X.

DThe total mass of the products is equal to the mass of the initial nucleus X.

✓ Correct answer

C: Nucleus Y is an isotope of nucleus X.

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Topic: Nuclear physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2014 Paper 1 Variant 2, question 38.

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