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    Exam 9: Deep Time: How Old Is Old
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    How Much of a Radioactive Parent Isotope Will Remain After
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How Much of a Radioactive Parent Isotope Will Remain After

Question 56

Question 56

Multiple Choice

How much of a radioactive parent isotope will remain after 3 half-lives have passed?


A) one-third
B) three-halves
C) one-eighth
D) one-sixth

Correct Answer:

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