Question detail
What is the primary consideration when selecting a radioactive isotope for medical use?
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. The isotope's cost
- B. The type of radiation emitted
- C. The color of the isotope
- D. The isotope's half-life
Answer
The type of radiation emitted
Explanation
The type of radiation emitted is a primary consideration when selecting a radioactive isotope for medical use, as it affects how the isotope interacts with body tissues and its effectiveness for imaging or treatment.
Common mistake
Misunderstanding Half-Life Duration
Students often confuse the concept of half-life with the total time a radioactive isotope remains active, thinking that a longer half-life means the isotope is active for a longer period overall.
Clarify that half-life is the time taken for half of the radioactive atoms in a sample to decay, and that isotopes with longer half-lives can still remain detectable for extended periods, but their activity decreases gradually.
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