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5.2 Radioactivity

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Question 33

This question is about radioactive materials.

a.

State the name of the high-energy electromagnetic radiation emitted by some unstable nuclei when they undergo radioactive decay.

[1]
b.

Describe the composition and the penetrating ability of a β−\beta^-β−-particle (beta-minus particle).

[2]
c.

Sodium-24 is a radioactive isotope. It has a half-life of 15 hours.

A sample contains sodium-24. Calculate the percentage of sodium-24 that remains in the sample after 45 hours have passed.

[3]
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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