1. If the amount of the parent isotope in the original sample of a rock had been 48 grams, about how much would have been left after three half-lives? 2. A parent isotope has a half-life of 500,000 years. If a rock contained 10 mg of the parent isotope when it formed, how much parent isotope would be left after 1.5 million years?
1. If the amount of the parent isotope in the original sample of a rock had been 48 grams, about how much would have been left after three half-lives? 2. A parent isotope has a half-life of 500,000 years. If a rock contained 10 mg of the parent isotope when it formed, how much parent isotope would be left after 1.5 million years?
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter20: Nuclear Chemistry
Section: Chapter Questions
Problem 20.23QP
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1. If the amount of the parent isotope in the original sample of a rock had been 48 grams, about how much would have been left after three half-lives?
2. A parent isotope has a half-life of 500,000 years. If a rock contained 10 mg of the parent isotope when it formed, how much parent isotope would be left after 1.5 million years?
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