Question

Why orbits are also called energy levels?

Answer 1

Each shell or orbit corresponds to a definite energy. Therefore, these circular orbits are also known as energy levels or energy shells.

The orbits of an atom actually represent the energy levels of the electrons in it.

The energy level decreases as the shell number increases. For example, The electrons in the first shell or orbit has more energy as compared to the others.

The orbits are named according to the energy levels or electrons in it. Hence orbits (shells) are also called energy levels.