THE PRACTICE STUDIO
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PRACTICE / Activity
Equal populations, unequal activities
Two independent radioactive samples contain the same number of undecayed nuclei. Their half-lives are 2 hours for A and 6 hours for B.
Find the ratio of activity A to activity B at this instant.
Organize the givens & assumptions
- Equal undecayed parent populations
- Half-life A: 2 h
- Half-life B: 6 h
Single parent isotopes, large populations and constant decay rates. No daughter contribution is included in activity.
- A
- B
- C
- D
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