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5.2 Radioactivity

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Question 115

Why is a thick concrete shield constructed around the core of a nuclear reactor?

A

Concrete absorbs highly penetrating radiation, such as gamma rays and neutrons.

B

Concrete decreases the half-life of the radioactive fuel.

C

Concrete increases the half-life of the radioactive fuel.

D

Concrete chemically neutralizes the emissions from the radioactive sources.

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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