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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A radioactive isotope X with a half life of 1.37 x 10^9 years decays to Y which is stable. A sample of rock from the moon was found to contain both the element X and Y which were in the ratio of 1 : 7. The age of the rock is

A radioactive isotope X with a half life of 1.37 x 10^9 years decays to Y which is stable. A sample of rock from the moon was found to contain both the element X and Y which were in the ratio of 1 : 7. The age of the rock is

Three alpha particles and one beta particles decaying takes place in series from isotope 88 R 238. Finally the isotope obtained will be