A-LevelPhysicsNuclear physics9702/12 · Oct/Nov 2021 · Q391 Mark

An unstable nucleus decays by emitting a β⁺ particle. Which statement is correct?

AAn antineutrino is also emitted.

Bneutron changes into a proton.

CMass-energy is conserved.

DThe nucleon number is not conserved.

✓ Correct answer

C: Mass-energy is conserved.

Oracle Prep sorts past-paper questions by topic, so you can drill Nuclear physics and see which topics are most likely to come up next.

Topic: Nuclear physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2021 Paper 1 Variant 2, question 39.

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