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5.2 Radioactivity

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Question 321

Which statement about beta-minus (β−\beta^-β−) decay is correct?

A

The mass number of the nucleus increases.

B

The nucleus changes to that of a different element.

C

The nucleus does not decay until after at least one half-life.

D

After two half-lives, the rate of beta-minus decay falls to zero.

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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