Assertion (A) : Bohr’s model is applicable only to hydrogenic (single electron) atoms. It cannot be extended to even two electron atoms such as helium. Reason (R) : The de Broglie hypothesis of matter waves supports the Bohr’s concept of stationary orbits.  

Assertion (A) : Bohr’s model is applicable only to hydrogenic (single electron) atoms. It cannot be extended to even two electron atoms such as helium. 
Reason (R) : The de Broglie hypothesis of matter waves supports the Bohr’s concept of stationary orbits. 
 

  1. A

    A and R are true and R is the correct explanation of A. 

  2. B

    A and R are true and R is not the correct explanation of A.  

  3. C

    A is true, R is false. 

  4. D

    Both A and R are false

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