Question detail
Which of the following is a disadvantage of using isotopes with very short half-lives?
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 are often less expensive.
- B. They require frequent replacement.
- C. They are safer for long-term use.
- D. They provide consistent radiation levels.
Answer
The correct answer is B: They require frequent replacement..
Explanation
The correct answer is B: They require frequent replacement.. This supports the learning objective "Explain why a very short half-life may make a source difficult to use." 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: They are often less expensive.; They are safer for long-term use.; They provide consistent radiation levels..
Common mistake
Short Half-Life Misunderstanding
Students often think that a very short half-life means the radioactive source is always safe to use because it decays quickly.
Emphasize that a very short half-life can lead to rapid decay, making it difficult to detect and use effectively, as the source may not remain active long enough for the intended application.
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