CAIE IGCSE Physics 5.2.5 Safety precautions Question Bank

Practise reducing radiation risk by linking ionising effects, half-life, handling, storage, shielding, distance and exposure time.

Exam points

explain how shielding, distance or time lowers the dose received from an ionising source

Covered syllabus points

5.2.5.1—Effects of ionising nuclear radiations 5.2.5.2—Radioactive materials are moved, used 5.2.5.3—Safety precautions for all ionising

[Maximum number: 2]

Radioactive isotopes are stored in thick lead containers.

State two precautions to be taken when radioactive isotopes are used.
1.
2.

[Maximum number: 2]

Strontium-90 $\left({ }_{38}^{90} \mathrm{Sr}\right)$ is a radioactive isotope that contains 38 protons and 52 neutrons. Strontium-90 decays to form an isotope of yttrium (Y) by emitting beta ( $\beta$ ) particles.

Explain why scientists limit the amount of time they are exposed to radioactive strontium.

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Covered syllabus points

5.2.5 Safety precautions question 1

5.2.5 Safety precautions question 2