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5.2 Radioactivity

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Question 108

The half-life of a radioactive isotope is ......1...... for the ......2...... of the isotope to decrease to half of its original value.

Which words correctly complete gaps 1 and 2?

A

1: half of the time taken; 2: proton number

B

1: half of the time taken; 2: activity

C

1: the time taken; 2: proton number

D

1: the time taken; 2: activity

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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