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Radioactive element has a half life of 2...

Radioactive element has a half life of 25 minutes. Calculate the fraction of element that has decayed in 60 minutes.

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Verified by Experts

Time duration 60 minutes =3 half lives. `N=(N_(0))/(2^(n)),n=3`
hence, fraction left `=(1)/(2^(3))=(1)/(8)`
fraction decayed `=(7)/(8)`
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