Ncert Exercises & Solutions

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?

Hint: The energy levels depend on the nuclear mass.

On removing one electron from He⁴ and He³, the energy levels, as worked out on the basis of Bohr model will be very close as both the nuclei are very heavy as compared to electron mass. Also after removing one electron from He⁴ and He³ atoms contain one electron and are hydrogen like atoms.

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