Neon is a noble gas that glows a bright orange-red color when electricity passes through it. This is the basis for neon signs, which use this phenomenon to create bright, colorful displays.
Other gases that emit color when excited by an electric current include:
* Argon: Blue-violet
* Helium: Pale yellow-pink
* Krypton: White-green
* Xenon: Blue-white
The color emitted by these gases is determined by the energy levels of the electrons within the gas atoms. When an electric current is applied, electrons become excited and jump to higher energy levels. As they return to their ground state, they release energy in the form of light, producing the characteristic color.
