The radioactive isotope Bismuth-210 has a half-life of 5 days. How many days does it take for 87.5% of a given amount to decay?
A)15 days
B)8 days
C)10 days
D)13 days
E)11 days
F)9 days
G)12 days
H)14 days

Name: The radioactive isotope Bismuth-210 has a half-life of 5 days. How many days does it take for 87.5% of a given amount to decay? A)15 days B)8 days C)10 days D)13 days E)11 days F)9 days G)12 days H)14 days
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Question

Quizplus · Accepted Answer

After 15 days, or three half-lives, 87.5% of the Bismuth-210 would have decayed.

The Radioactive Isotope Bismuth-210 Has a Half-Life of 5 Days