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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : The Bohr model is applicable to hydrogen and hydrogen-like atoms only Reason R : The formulation of Bohr model does not include repulsive force between electrons In the light of the above statements, choose the correct answer from the options given below :

1. A is true but R is false
2. A is false but R is true
3. Both A and R are true but R is NOT the correct explanation of A
4. Both A and R are true and R is the correct explanation of A

Correct answer: Both A and R are true and R is the correct explanation of A

Solution

The Bohr model is specifically designed for hydrogen and hydrogen-like atoms due to its simplifications, which do not account for electron-electron repulsion in multi-electron systems. Therefore, the assertion is true, and the reason correctly explains why the model is limited to these types of atoms.

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