According to the modern revised model of an atom, electrons are confined to clearly defined orbits. Electrons occupy only certain orbits around the nucleus. Those orbits are stable and are called stationary orbits. This was proposed by Neils Bohr.
As per the revised model of an atom
- The electrons inside atoms are placed in discrete orbits called stationary orbits.
- Electrons can jump to higher levels by absorbing energy and move to lower energy levels by losing or emitting their energy.
- As longs as, an electron stays in its own stationery, there will be no absorption or emission of energy.
- Electrons revolve around the nucleus in these stationary orbits only.