Neon is one of the noble gases on the Periodic Table. The other five Noble Gases are Helium, Argon, Kryton, Xenon, and Radon. The lights that produce a large array of colors are made by these gases. Neon creates a different color than the other gases because the electron emission spectrum.
The Electron Emission Spectrum is a spectrum of frequencies of electromagnetic radiation that is emitted from the element's atom when they return to a lower energy state.
Since each element has a different amount of electrons, the colors vary.
Helium: Red
Neon: Yellow-gold, orange
Argon: blue
Kryton: purple
Xenon: white
Radon: yellow, orange-red
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