Question

Bohr's model of atom and its limitations

Answer 1

according to Bohr model
an atom has two parts electron and neutron.
when atom is in original state it is called ground state when it is moved to a higher level it is called excited state.
an atom revolves around in those orbit which has an angular momentum.

Answer 2

He proposed a model in which he told that electrons revolve around the nucleus in a fixed path called shells.shells have a fixed size and energy.Its  limitation was that it failed to explain the Zeeman effect when the spectral line is split into several components in the presence of a magnetic field.