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The noble gases include helium, neon, argon, krypton, xenon, and radon. 1  Helium has the atomic number two and is the second most abundant element in the universe. 2  Neon has the atomic number ten and is commonly used in lamps for the red-orange glow it gives off when exposed to electricity.  Argon has the atomic number 18.
Noble Gases. The noble gases are the elements at the far right-hand column of the periodic table: helium, neon, argon, xenon, and radon. Because of the group they belong to, they each have a full valence shell or level. In the case of helium, a full valence shell has two electrons, and in the remaining noble gases, eight electrons make up a full valence shell.