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A rock is 1.5xx10^(9) year old. The rock contains ""^(238)U which disigntegrates to form ""^(206)U. Assming that there is no ""^(206)Pb in the rock initially at t=0) and its is the only stable product formed in the decay Consider (T_(1//2))_(v)=4.5xx10^(9) years and 2^(1//3)=2^(1//3)=1.259. The ratio of the number of nuclei of ""^(218)U and""^(206)Pb in the rock is nearly ______ (round off to the nearcst integer) |
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Answer» 1 |
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