Question: solve ~ weer eee An unknown radioactive element decays into non-radioactive substances. In 920 days the radioactivity of a sample decreases by 53 percent. (a)

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~ weer eee An unknown radioactive element decays into non-radioactive substances. In 920 days the radioactivity of a sample decreases by 53 percent. (a) What is the half-life of the element? half-life: | (days) (b) How long will it take for a sample of 100 mg to decay to 52 mg? time needed: | (days) Question Help: (] Video

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