Question

According to postulates of Bohr's atomic model, the electrons in atom move round the nucleus :

• A. in definite circular orbits known as stationary orbits
• B. in energy levels or shell
• C. both $A$ and $B$
• D. none of the above

Answer 1

The correct option is C both $A$ and $B$

According to postulates of Bohr's atomic model, the electrons in atom move round the nucleus :

• In definite circular orbits known as stationary orbits
  
• In energy levels or shell
  

Note:
Electrons revolve around the nucleus in concentric circular orbits at fixed distance from nucleus. These are stationary orbits and the energy of electrons in these orbits is constant.