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5.2 Radioactivity

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Question 152

Which row shows what happens when a nucleus decays by emitting a β+\beta^+β+ particle (positron)?

A

Change in the nucleus: a neutron changes to a proton and a positron | Particle emitted: positron

B

Change in the nucleus: a proton changes to a neutron and a positron | Particle emitted: electron

C

Change in the nucleus: a proton changes to a neutron and a positron | Particle emitted: positron

D

Change in the nucleus: a neutron changes to a proton and an electron | Particle emitted: electron

Markscheme

5.2 Radioactivity Questions

  1. IGCSE
  2. /Physics
  3. /5.2 Radioactivity

484 exam-style questions on CIE IGCSE Physics 5.2 Radioactivity, covering 5.2.1 Background radiation and measuring count rate, 5.2.2a Alpha, beta and gamma emission, 5.2.2b Deflection and ionising effects of nuclear radiation, 5.2.3a Radioactive decay, 5.2.3b Effects of decay on the nucleus and decay equations, 5.2.4a Half-life, 5.2.4b Choosing isotopes for applications, and 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.

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