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The radioactive element polonium decays

The radioactive element polonium decays according to the law given below where Q0 is the initial amount and the time t is
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2. asked by Anonymous
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A radioactive element decays exponentially according to the function Q(t) = Q0ekt.If 100 mg of the element decays to 25 mg in 12
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2. asked by Rania
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A radioactive element decays exponentially according to the function Q(t) = Q0ekt.If 100 mg of the element decays to 25 mg in 12
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2. asked by Rania
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An unknown radioactive element decays into non-radioactive substances. In 420 days the radioactivity of a sample decreases by 39
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2. asked by Kim
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An unknown radioactive element decays into non-radioactive substances. In 120 days the radioactivity of a sample decreases by 59
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2. asked by Erica
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If 250 mg of a radioactive element decays to 200 mg in 48 hours, find the half-life of the element
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2. asked by Dom
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IF 80mg of a radioactive element decays to 10mg in 30 minutes, the half-life of this element isa.10 min b.20 min c.30 min d.40
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2. asked by Jazmin
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An unknown radioactive element decays into non-radioactive substances. In 100 days the radioactivity of a sample decreases by 64
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2. asked by Rachel
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If 250mg of a radioactive element decays to 200mg in 48 hours, find the half-life of the element.ln(N<sub>o</sub>/N) = kt
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2. asked by Jen
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In 4 years, 30% of a radioactive element decays. Find its half-life. (Round your answer to one decimal place.)_____ yr
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2. asked by Dee
3. 1,659 views