Question

what do you mean by Bohr's stable orbit​

Answer 1

The atom will be completely stable in the state with the smallest orbit, since there is no orbit of lower energy into which the electron can jump. Bohr's starting point was to realize that classical mechanics by itself could never explain the atom's stability.

thanku..

Answer 2

In 1913 Bohr proposed his quantized shell model of the atom (see Bohr atomic model) to explain how electrons can have stable orbits around the nucleus. The atom will be completely stable in the state with the smallest orbit, since there is no orbit of lower energy into which the electron can jump.