Question detail
Why are gamma emitters often used as medical tracers?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Hazards and uses of radioactive emissions and of background radiation
Question
- A. They have a long half-life and high ionising power.
- B. They can penetrate tissues without causing significant damage.
- C. They are easily detected by external sensors.
- D. They emit alpha particles which are safer.
Answer
The correct answer is B: They can penetrate tissues without causing significant damage..
Explanation
The correct answer is B: They can penetrate tissues without causing significant damage.. This supports the learning objective "Explain why gamma emitters are often used as medical tracers." in Uses of nuclear radiation because it uses the correct atomic and nuclear radiation relationship for Hazards and uses of radioactive emissions and of background radiation. The other options are less suitable because they do not match the required Uses of nuclear radiation idea: They have a long half-life and high ionising power.; They are easily detected by external sensors.; They emit alpha particles which are safer..
Common mistake
Misunderstanding Gamma Emitters
Students often confuse gamma emitters with other types of radiation, thinking they have similar properties and uses.
Focus on the unique characteristics of gamma radiation, such as its high penetration power and low ionising ability, which make it suitable for medical tracers.
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