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What is the half-life of the element

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Reference no: EM131335632

1. An unknown radioactive element decays into non-radioactive substances.In ' 1000' days the radioactivity of a sample decreases by '62' 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 '87' mg?

 

In what year did/will the exports reach $9.7 billion?

Reference no: EM131335632

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