Question

(b) How did Bohr explain the stability of the atom?

Answer 1

Bohr's model of an atom:

1. Niels Bohr proposed a new model of the atom based on Planck's quantum theory.
2. The drawbacks of Rutherford's model were overcome by Bohr's model of an atom.
3. According to Bohr:
   1. The negatively charged electrons revolve only in the orbits that have fixed energy. These orbits are stationary orbits.
   2. As long as the electrons remain in a particular orbit, it will neither absorb nor emits energy.
   3. When the electron jumps from a lower to higher energy shell, it absorbs a definite amount of energy.
   4. When the electron jumps from higher to lower energy sell, it emits radiation.

Thus, according to Bohr, as the electrons do not radiate energy while revolving, the atom does not shrink and remains stable.