Question

Which of the following are failures of Bohr's Atomic model

• A. Bohr model could not explain those atoms which have more than one electron like lithium, helium. This model was applicable only for those atoms which have one electron.
• B. Bohr theory explained only spherical orbits. There was no explanation for elliptical orbits.
• C. Bohr's atomic model propose that the electron revolve round then nucleus.
• D. Both A and B

Answer 1

The correct option is D Both A and B

1. Bohr model could not explain those atoms which have more than one
   electron like lithium, helium. This model was applicable only for those
   atoms which have one electron.
2. Bohr theory explained only spherical orbits. There was no explanation for elliptical orbits.
3. So the postulate that the Bohr's atomic model propose that the electron revolve round then nucleus is not a failure.
   

Hence option D is correct.