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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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drelog drelog
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8 years ago
The ratio of parent to daughter isotopes in a radioactive decay process is 0.40. How many half-lives have elapsed since the material was 100% parent atoms?
A) between l and 2
B) less than l
C) more than 3
D) between 2 and 3
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Earth Science

Earth Science


Edition: 14th
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PulsaPulsa
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8 years ago
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drelog Author
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#2
8 years ago
Exactly what I needed, exam is tomorrow!
ןnɟʎoɾ sʎɐʍן∀ Slight Smile
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