Question

The radius (rₙ) of nᵗʰ orbit in Bohr model of hydrogen atom varies with n as

The radius of the nth orbit in Bohr model of hydrogen atom is proportional to :

Draw a graph showing the variation of binding energy per nucleon as a function of mass number A. The binding energy per nucleon for heavy nuclei (A > 170) decreases with the increase in mass number. Explain.

Draw a graph showing the variation of number of particles scattered (N) with the scattering angle θ in Geiger-Marsden experiment. Why only a small fraction of the particles are scattered at θ > 90° ? Mention two limitations of Rutherford nuclear model of an atom.