Question detail
Why is it important to consider the half-life of a radioactive isotope in medical applications?
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. To ensure it can be used for a longer duration.
- B. To minimize the risk of radiation exposure to patients.
- C. To increase the ionising power of the radiation.
- D. To ensure it is easily detectable in the body.
Answer
The correct answer is B: To minimize the risk of radiation exposure to patients..
Explanation
The correct answer is B: To minimize the risk of radiation exposure to patients.. This supports the learning objective "Explain why a very long half-life can increase long-term hazard." in Different half-lives of radioactive isotopes 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 Different half-lives of radioactive isotopes idea: To ensure it can be used for a longer duration.; To increase the ionising power of the radiation.; To ensure it is easily detectable in the body..
Common mistake
Long Half-Life Misunderstanding
Students often confuse a long half-life with a low hazard, thinking it means less risk over time.
Emphasize that a long half-life means the radioactive material remains active and potentially hazardous for a longer duration, increasing long-term risk.
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