An atom must emit a photon when a(n) ____.
A) electron moves from a lower to a higher energy level
B) proton moves from a lower to a higher energy level
C) proton moves from a higher to a lower energy level
D) electron moves from a higher to a lower energy level
E) atom becomes ionized

Question

Quizplus · Accepted Answer

An atom emits a photon when an electron transitions from a higher to a lower energy level, releasing energy in the form of light.

An Atom Must Emit a Photon When A(n) ____