Chemistry - Atomic Structure Question with Solution | TestHub

An atom in a stationary state does not emit electromagnetic radiation as long as it stays in the same state

An atom can take only certain distinct energies ${\mathrm{E}}_1,{\mathrm{E}}_2,{\mathrm{E}}_3$, etc. These allowed states of constant energy are called the stationary states of atom

When an electron makes a transition from a higher energy stationary state to a lower energy stationary state, then it emits a photon of light

The electron in a H atom's stationary state moves in a circle around the nucleus