Nuclei

An alpha particle of energy is scattered through by a fixed uranium nucleus. The distance of closest approach is of the order of

A star initially has deuterons. It produces energy via the processes and . If the average power radiated by the star is W, the deuteron supply of the star is exhausted in a time o f the order of

Order of magnitude of density of uranium nucleus is

Binding energy per nucleon versus mass number curve for nuclei is shown in figure. W, X, Y and Z are four nuclei indicated on the curve. The process that would release energy is

In the options given below, let E denote the rest mass energy of a nucleus and n a neutron. The correct option is

In a radioactive decay chain, nucleus decays to nucleus. Let and be the number of and particles, respectively, emitted in this decay process. Which of the following statements is (are) true?

In a radioactive sample, nuclei either decay into stable nuclei with decay constant per year or into stable nuclei with decay constant per year. Given that in this sample all the stable and nuclei are produced by the nuclei only. In time years, if the ratio of the sum of stable and nuclei to the radioactive nuclei is , the value of t will be : [Given ]