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A sample of uranite a uranium confainig mineral was found on analysis to contain 0.214gm of .^(206Pb for evert gm of .^(238)U. If all the lead came from the radioactive disintegration of uranium and assume that all isotopes of uranium other than .^(238)U can be neglected, estimate the date when the mineral was formed in the earth crust. (The half-life of .^(238)U is 4.5xx10^(9) years). |
| Answer» SOLUTION :`1.5xx10^(9)` YEARS | |