The half-life of uranium238 upper index 92 lower index
The half-life of Uranium(238 upper index 92 lower index) against alphy decay is 4.5x10^9 yr.
(a) How long does it take for seven-eigths of a sample of this isotope to decay?
(b) For fifteen-sixteenths to decay?
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the half-life of uranium238 upper index 92 lower index against alphy decay is 45x109 yra how long does it take for
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