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A rock contains 0.30 mg of Pb- 206 and 0.65 mg of U-238.Approximately how many U-238 atoms were in rock when it formedbillions years ago ( the half life for 238^ U ->206^ Pb is 4.5 X10^9 yr) Answer in Atoms
A rock contains 0.30 mg of Pb- 206 and 0.65 mg of U-238.Approximately how many U-238 atoms were in rock when it formedbillions years ago ( the half life for 238^ U ->206^ Pb is 4.5 X10^9 yr) Answer in Atoms
Irving HeathcoteLv2
13 Dec 2019
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