49 19K isotope of potassium has a half-life of 1.4×10^9 yr and decays to form stable argon
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49 19K isotope of potassium has a half-life of 1.4×10^9 yr and decays to form stable argon, 40 18Ar. A sample of rock has been taken which contains both potassium and argon in the ratio 1:7, i.e., (Number of potassium-14a→ms)/(Number of argon-40a→ms)=12 Assuming that when the rock was formed no argon −40 was present in the sample and none has escaped subsequently, determine the age of the rock.
05
Jun
49 19K isotope of potassium has a half-life of 1.4×10^9 yr and decays to form stable argon, 40 18Ar. A sample of rock has been taken which contains both potassium and argon in the ratio 1:7, i.e., (Number of potassium-14a→ms)/(Number of argon-40a→ms)=12 Assuming that when the rock was formed no argon −40 was present in [...]
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(Number of potassium-14a→ms)/(Number of argon-40a→ms)=12 Assuming that when the rock was formed no argon −40 was present in the sample and none has escaped subsequently ,
40 18Ar. A sample of rock has been taken which contains both potassium and argon in the ratio 1:7 ,
49 19K isotope of potassium has a half-life of 1.4×10^9 yr and decays to form stable argon ,
determine the age of the rock. ,
i.e ,