An unknown radioactive element decays into non-radioactive substances. In 340 days the radioactivity of a sample...

An unknown radioactive element decays into non-radioactive substances. In 340 days the radioactivity of a sample decreases by 37 percent. (a) What is the half-life of the element? (b) How long will it take for a sample of 100 mg to decay to 74 mg? time needed: (days)

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Colby Messinger answered 1 year ago

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