Uses Of Nuclear Radiation (GCSE Physics)

Which of the following describes why short-lived isotopes are preferred as medical tracers?

Which of the following would be the best immediate precaution to reduce exposure risk when handling a sealed gamma source?

If a radioisotope has a half-life of 10 years, what fraction of the original activity remains after 30 years?

Which device is typically used in hospitals to deliver targeted high-dose radiation to a tumour while sparing surrounding tissue?

Which property makes gamma radiation particularly suitable for treating deep-seated tumours compared with alpha radiation?

What does the unit becquerel (Bq) measure?

Which statement correctly ranks penetration power from lowest to highest?

Carbon-14 has a half-life often used in radiocarbon dating. If a sample originally had 1000 atoms of C-14 and three half-lives have passed, how many C-14 atoms remain?

Which of the following best explains why wearing a lab coat and gloves alone is not sufficient protection when working with unsealed alpha-emitting sources?

If a piece of radioactive waste has a very long half-life, what is a typical precaution for its management?

A sample contains 8000 atoms of a radioactive isotope with a half-life of 20 seconds. After 60 seconds how many atoms remain?