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5.2 Radioactivity

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Question 88
a.

Identify which type of radiation (α\alphaα-particles, β\betaβ-particles, or γ\gammaγ-rays) matches each characteristic description below:

  1. It is the most ionizing of the three types of radiation.
  2. It has the greatest penetrating depth through materials.
  3. It has a net positive charge.
[3]
b.

A sample of radioactive material contains 120 mg120\text{ mg}120 mg of a radioactive isotope. The half-life of this isotope is 8 days8\text{ days}8 days.

Calculate the mass of the isotope remaining in the sample after 24 days24\text{ days}24 days.

[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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