In order for the atoms in a neon discharge tube (or a neon beer sign) to emit their characteristic orange light, it is necessary that
A) the atoms be continually replaced with fresh atoms, because the energy of the atoms tends to be used up with continued excitation, resulting in dimmer and dimmer light.
B) electrons first be given energy to raise them from their ground state to an excited state.
C) there be no unoccupied energy levels in each atom.
D) each atom carry a net electric charge.

Question

Quizplus · Accepted Answer

Electrons in neon atoms must first absorb energy to be excited from their ground state to a higher energy level. When they return to a lower energy level, they release energy in the form of light, which is the characteristic orange glow of neon signs. The other options do not accurately describe the process of light emission in neon discharge tubes.

In Order for the Atoms in a Neon Discharge Tube