SOLUTION: An unknown radioactive element decays into non-radioactive substances. In 820 days the radioactivity of a sample decreases by 28 percent.
(a) What is the half-life of the elemen
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Question 1088855: An unknown radioactive element decays into non-radioactive substances. In 820 days the radioactivity of a sample decreases by 28 percent.
(a) What is the half-life of the element?
half-life
(b) How long will it take for a sample of 100 mg to decay to 63 mg?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
So if you started with , in 820 days you'd have .
So then,
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a)
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b)
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