Question

How does Bohr improve Rutherford's atomic model?

Answer 1

Bohr improved Rutherford's model by proposing that electrons travelled about the nucleus in orbits that had specific energy levels. ... Bohr's model was an improvement because it explained why the light emitted by atoms consists of lines of certain colours.

Answer 2

Rutherford's planetary model had two major flaws:

• It stated that electrons revolved around the nucleus randomly in a circular motion. This inference meant that electrons would continuously their energy in the form of kinetic energy, emitting electromagtic radiation, and would eventually crash into the nucleus. This implied that an atom was unstable, which was observably untrue.
• It stated that atoms emitted radiation in the form of continuous line spectra. This was untrue because it was seen that electrons instead  emitted discrete line spectra.

Bohr's model improved upon Rutherford's planetary model:

• It stated that rather than randomly moving around the nucleus in a circular motion, electrons instead revolved around in orbits at a fixed distance from the nucleus. This explained the stability of the atom by implying that electrons did not lose their kinetic energy due to moving at a fixed energy level in a specific orbit.
• It explained that electrons emitted radiation only once they were excited to a higher energy level and orbit.