Question detail
Why is it impossible to predict when an individual unstable nucleus will decay?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Atoms and nuclear radiation
Question
Why is it impossible to predict when an individual unstable nucleus will decay?
Answer
It is impossible to predict when an individual unstable nucleus will decay because radioactive decay is a random process. Each nucleus has a certain probability of decaying over a given time period, but the exact moment of decay cannot be determined.
Explanation
This answer effectively explains the inherent randomness of radioactive decay, highlighting the unpredictability of individual events. The question assesses the student's understanding of the nature of radioactive decay as a random process.
Common mistake
Misunderstanding Half-Life Definition
Students often confuse half-life with the total time it takes for a radioactive substance to decay completely, rather than understanding it as the time taken for the count rate or activity to fall to half its initial value.
To fix this, students should focus on the definition of half-life as a specific time interval where only half of the original amount remains, rather than the total decay time.
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