Question

Fill in the blanks
According to Bohr's atomic model , electrons revolve around the nucleus in _________ orbits.

Answer 1

According to Neils Bohr, the electrons could revolve around the nucleus in only certain orbits at various energy levels, each orbit having a different radius.

Electrons revolve round the nucleus with definite velocities in concentric circular orbits situated at definite distances from the nucleus. The energy of an electron in a certain orbit remains constant. As long as it remains in that orbit, it neither emits nor absorbs energy. These are termed stationary states or main energy states.