After exactly 8 hours, the activity level of a sample of a particular radioactive isotope, which decays into a stable is
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After exactly 8 hours, the activity level of a sample of a particular radioactive isotope, which decays into a stable is
After exactly 8 hours, the activity level of a sample of a particular radioactive isotope, which decays into a stable isotope, has fallen to 20.0% of its initial value. Calculate the half-life of this isotope. hr
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