question_answer 31)

  Imagine removing one electron from He4 and He3. Their energy levels, as worked out on the basis of Bohr model will be very close. Explain why.

Answer:

                  Imagine one electron removed from ^He4 and 2He3. As both the residual nuclei are very heavy compared to the mass of electron removed, therefore, their energy levels, worked out on the basis of Bohr model, will be very close.