A rock sample contains 1 mg of 206 pb and 4 mg of u 238 whose half life is 4.47*10^9 y. how long ago the rock formed
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It moves back in the periodic table until the isotope falls in the band of stability at Pb 206.
Each step has its own individual half - life but the first decay to Th 234 is about 20,000 times slower than the other decay steps.
Those of you who are familiar with chemical kinetics will know that it is the slowest step in a mechanism which determines the overall rate of reaction, the so - called "rate determining step".
This is the case here in the conversion of U 238 to Pb 206.
As the U 238 decays exponentially, the amount of Pb 206 grows correspondingly
Each step has its own individual half - life but the first decay to Th 234 is about 20,000 times slower than the other decay steps.
Those of you who are familiar with chemical kinetics will know that it is the slowest step in a mechanism which determines the overall rate of reaction, the so - called "rate determining step".
This is the case here in the conversion of U 238 to Pb 206.
As the U 238 decays exponentially, the amount of Pb 206 grows correspondingly
Answered by
0
It moves back in the periodic table until the isotope falls in the band of stability at Pb 206.
Each step has its own individual half - life but the first decay to Th 234 is about 20,000 times slower than the other decay steps.
Those of you who are familiar with chemical kinetics will know that it is the slowest step in a mechanism which determines the overall rate of reaction, the so - called "rate determining step".
This is the case here in the conversion of U 238 to Pb 206.
As the U 238 decays exponentially, the amount of Pb 206 grows correspondingly
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