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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A radioactive sample of ^(238)U decay to Pb through a process for which the half is 4.5 × 10^9 year. Find the ratio of number of nuclei of Pb to ^(238) U after a time of 1.5 × 10^9 year Given (2)1/3 = 1.26

A radioactive sample of ^(238)U decay to Pb through a process for which the half is 4.5 × 10^9 year. Find the ratio of number of nuclei of Pb to ^(238) U after a time of 1.5 × 10^9 year Given (2)1/3 = 1.26

Excitation energy of a hydrogen like ion in its first excitation state is 40.8 eV. Energy needed to remove the electron from the ion in ground state is