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5.2 Radioactivity

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Question 255

Which change is occurring in a nucleus during β+\beta^+β+-emission (positron emission)?

A

A neutron becomes one proton and one positron.

B

A proton becomes one neutron and one positron.

C

A proton and an electron become one neutron.

D

A neutron and a positron become one proton.

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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