Question detail
How does a very long half-life affect the use of a radioactive isotope in industry?
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. It makes the isotope less effective for short-term applications.
- B. It allows for continuous monitoring without frequent replacement.
- C. It increases the cost of disposal.
- D. It reduces the need for safety precautions.
Answer
The correct answer is C: It increases the cost of disposal..
Explanation
The correct answer is C: It increases the cost of disposal.. 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: It makes the isotope less effective for short-term applications.; It allows for continuous monitoring without frequent replacement.; It reduces the need for safety precautions..
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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