Mention the Merits of Bohr's theory.

Explanation

(i) The atom model provided the basic foundation for the development of quantum mechanics.
(ii) The value of Rydberg's constant R was arrived theoretically.
Note: Other merits are :
(iii) The theory for the first time predicted the size of an atom in terms of absolute constants.
(iv) This model made use of the principle of quantisation of angular momentum and energy states of hydrogen and hydrogenic atoms.