Exam-style question
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What can be inferred from a decay graph that shows a steep decline in activity?.
- A.The substance has a long half-life
- B.The substance is highly radioactive
- C.The substance is stable
- D.The substance has a low decay constant
Model answer
What a good answer should say
- The substance is highly radioactive
Explanation
Why this works
The evidence from a decay graph showing a steep decline in activity suggests that the substance is undergoing rapid decay. This indicates a high decay constant, which is characteristic of highly radioactive materials.
The implication is that such substances pose greater risks due to their quick decay rates. Thus, the conclusion is that a steep decline in activity correlates with high radioactivity, necessitating careful handling and monitoring.
Common mistake
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