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5.2 Radioactivity

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Question 109

The half-life of the radioactive isotope tritium 13H^{3}_{1}\text{H}13​H is 12 years.

Starting with 40 g of the isotope, which mass of the isotope remains after 48 years?

A

10.0 g10.0\text{ g}10.0 g

B

5.00 g5.00\text{ g}5.00 g

C

2.50 g2.50\text{ g}2.50 g

D

1.25 g1.25\text{ g}1.25 g

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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