Helium/2/nonmetal/Nobel Gas. Helium in greek means sun. All natural gases have a trace of Helium. The fusion of Hydrogen/1/nonmetal into Helium is what creates the energy for the Hydrogen bomb by periodic.lanl.gov ( DON'T TRY TO DO IT). Helium has the lowest melting point out of any element. The boiling point is close to absolute zero which is why it is use in cryogenic research. Helium is only liquid that cannot be solidified by lowering the temperature but by raising the pressure. Helium is used as 1, an inert gas shield for arc welding, 2 a protective gas in growing Silicon/14/metalloid and Germanium/32/metalloid crystals and producing Titanium/22/metal and Zirconium/40/metal, 3 a cooling medium for nuclear reactors, and 4 a gas for supersonic wind tunnels.
~Neon/10/nonmetal/Noble Gas. Neon in Greek means new. In the atmosphere it is 1 part in 65,000. It is obtained by liquidating the air and separating the gases. Neon has 9 isotopes, 3 natural, and 6 unstable. Neon is a very inert gas. In a vacuum discharge tube, Neon glows a reddish orange. It has at least 40 times more refrigerator capacity than liquid Helium/2/nonmetal/Nobel Gas and 3 times of that of liquid Hydrogen/1/nonmetal. Neon is used in TVs and in making gas lasers.
~Argon/18/nonmetal/Nobel Gas. In Greek it means inactive. It exists as 1.6% of Mars's atmosphere. It is colorless and odorless in both gas and liquid states of matter. It is used in all lighting equipment since it does not react with the bulbs Tungsten/74/metal, like oxygen.
~Krypton/36/nonmetal/Nobel Gas. In Greek it means hidden. It is the residue left after boiling liquid air.
~Xenon/54/nonmetal/Nobel Gas. In Greek it means stranger. It is also the residue left after boiling liquid air. It is present in the atmosphere 0.000005%. When electrocuted it glows blue.
~Radon/86/nonmetal/Nobel Gas. First called niton which in Latin meaning shinning. It is the heaviest known gas. When the temperatures drop below freezing, it exhibits a brilliant phosphorescence.