Question detail
What is the relationship between the half-life of a radioactive isotope and the rate at which its activity decreases?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Hazards and uses of radioactive emissions and of background radiation
Question
What is the relationship between the half-life of a radioactive isotope and the rate at which its activity decreases?
Answer
The half-life of a radioactive isotope is the time taken for half of the radioactive nuclei in a sample to decay. A shorter half-life means that the activity decreases more rapidly, while a longer half-life indicates a slower decrease in activity.
Explanation
This question tests the understanding of how half-life relates to the decay process of radioactive isotopes. It requires students to connect the concept of half-life with the practical implications on activity levels, demonstrating their grasp of radioactive decay.
Common mistake
Misunderstanding Half-Life
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 half of the substance to decay.
To fix this, students should focus on the definition of half-life and practice problems that illustrate how after each half-life, only half of the remaining substance decays.
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