An atom will emit a photon when an electron:
A) completes an orbit.
B) shifts from the ground state to an excited state.
C) falls into the nucleus.
D) moves from an outer orbit to an inner orbit.

Question

Quizplus · Accepted Answer

Atoms emit photons when an electron transitions from a higher energy level (outer orbit) to a lower energy level (inner orbit), releasing energy in the form of light.

An Atom Will Emit a Photon When an Electron