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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Shivam Sharma posted an Question
September 03, 2020 • 21:46 pm
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30 points
30 points
- CSIR NET
- Earth Sciences
(ii) using equation in 33{axi), estimate the decay constant, which would be suitable for dating 4.2 ga old rock. assume that the rock has roughly equal proporti
(ii) Using equation in 33{aXi), estimate the decay constant, which would be suitable for dating 4.2 Ga old rock. Assume that the rock has roughly equal proportions of parent and daughter atoms at present. Consider ln 2 = 0.693. (3) )Name the radioactive isotopes, which yield 20*Pb, Pb and "Pb. (9)
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Shivam sharma
So Half life equal to 0.693 Divided by Decay constant
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Sajan sarthak Best Answer
see answer for question 1in updated attached file that is 1.54 * 10^-10 Answer for second one There are four radioactive isotopes of lead: 210Pb and 214Pb in the 238U decay chain, 211Pb in the 235U decay chain, and 212Pb in the 232Th decay chain. All except 210Pb have half-lives of less than 12 hours.
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Sajan sarthak![best-answer]()
see the answer shivam