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5.2 Radioactivity

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Question 26

A sample contains 600 mg of a radioactive isotope.

The half-life of this isotope is 8 hours8\text{ hours}8 hours.

What mass of the isotope remains after 24 hours24\text{ hours}24 hours?

A

75 mg75\text{ mg}75 mg

B

150 mg150\text{ mg}150 mg

C

200 mg200\text{ mg}200 mg

D

300 mg300\text{ mg}300 mg

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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