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O-LevelPhysicsNuclear Physics5054/11 · Oct/Nov 2021 · Q381 Mark

Technetium-99m is a radioactive isotope used in medical scanning. It is injected into the body and its emissions are detected outside the body. Which characteristics of technetium-99m make it suitable for use in medical scanning?

AIt has a long half-life and emits alpha radiation.
BIt has a long half-life and emits gamma radiation.
CIt has a short half-life and emits alpha radiation.
DIt has a short half-life and emits gamma radiation.

✓ Correct answer

D: It has a short half-life and emits gamma radiation.

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About this question

Topic
Nuclear Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source
O-Level Physics, Oct/Nov 2021 Paper 1 Variant 1, question 38.

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