In nuclear chemistry, secular equilibrium is attained when
Question and options
In nuclear chemistry, secular equilibrium is attained when
- the parent nuclei has very short half-life period and daughter nuclei has long half-life period
- the daughter nuclei has very short half-life period and parent nuclei has long half-life period
- the parent and daughter nuclei have equal half-life periods
- both parent and daughter nuclei has very long half-life period
Answer and explanation
Correct answer: B - the daughter nuclei has very short half-life period and parent nuclei has long half-life period
Secular equilibrium is reached when the parent is very long-lived and the daughter very short-lived, so the daughter's activity becomes equal to the parent's. Short-lived parent/long-lived daughter gives no equilibrium, and equal or both-long half-lives do not give secular equilibrium.
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