Monazite sample contains 9% `ThO\"\"_(2)` and 0.35% `U\"\"_(3)O\"\"_
Channel: Doubtnut
Date: 16/02/2020

Monazite sample contains 9% `ThO\"\"_(2)` and 0.35% `U\"\"_(3)O\"\"_(8).Pb\"\"^(208)` and `Pb\"\"^(206)` are the stable and products in the radioactive decay series of `Th\"\"^(232)` and `U\"\"^(238)` respectively. All the lead in mozaite is of radiogenic origin. The isotopic ratio of `Pb\"\"^(208)/Th\"\"^(232)` was found to be 0.104. The half lives of Th and U are `1.41xx10\"\"^(16)` years and `4.47xx10\"\"^(9)` years respectively. Select the information incorrect about `Th\"\"^(232)`