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5.2 Radioactivity

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Question 211

Why are radioactive gamma-ray sources stored in thick-walled containers made of lead?

A

Lead absorbs the highly penetrating gamma radiation.

B

Lead reduces the half-life of the radioactive source.

C

Lead increases the rate of radioactive decay inside the container.

D

Lead chemically neutralizes the radioactive isotope.

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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