Exam-style question
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Describe the nature of radioactive decay and explain why it is considered random and exponential.
Model answer
What a good answer should say
- Radioactive decay is a random process because it is impossible to predict when a particular nucleus will decay.
- It is exponential because the rate of decay is proportional to the number of undecayed nuclei, leading to a consistent fraction of the remaining nuclei decaying over equal time intervals.
Explanation
Why this works
This answer is strong as it clearly defines the randomness and exponential nature of radioactive decay, which are key concepts in understanding nuclear physics. The question tests the student's ability to articulate fundamental principles of radioactivity.
Common mistake
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