A-LevelPhysicsParticle physics9702/12 · Feb/Mar 2024 · Q401 Mark

A nucleus of carbon-10, ¹⁰C, decays by beta-emission to form a nucleus of boron-10, ¹⁰B. For this decay process, what is the change to a nucleon and what is the change in the quark composition of the nucleon?

Achange to nucleon proton to neutron, change in quark composition down becomes up

Bchange to nucleon proton to neutron, change in quark composition up becomes down

Cchange to nucleon neutron to proton, change in quark composition down becomes up

Dchange to nucleon neutron to proton, change in quark composition up becomes down

✓ Correct answer

B: change to nucleon proton to neutron, change in quark composition up becomes down

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Topic: Particle physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2024 Paper 1 Variant 2, question 40.

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