Exam-style question
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What is the relationship between radioactive decay and time?.
- A.Decay occurs at a constant rate over time.
- B.The rate of decay decreases exponentially over time.
- C.The probability of decay remains constant over time.
- D.Decay is influenced by the amount of substance present.
Model answer
What a good answer should say
- The probability of decay remains constant over time.
Explanation
Why this works
In radioactive decay, the probability of a nucleus decaying in a given time interval is constant, leading to an exponential decrease in the number of undecayed nuclei over time.
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