01. Helium (He).
Uses of helium (He) include, as it much less dense than air (lighter), filling weather balloons, airships, and decorative balloons. Helium is also used to cool metals down to extremely low temperatures so that they lose their electrical resistance and become super-conductors. Helium is the second most abundant element in the universe after Hydrogen.
Helium is No. 2 on the Periodic Table of Elements meaning it has two protons.
02. Neon (Ne).
Uses of neon (Ne) include, filling of advertising signs, Neon glows a reddish orange colour when electricity is passed through it in a vacuum discharge tube, red signs will usually contain pure neon. Neon is lightweight and colorless in general.
Neon is under Helium in the periodic table.
Neon is No. 10 on the Periodic Table of Elements meaning it has ten protons.
03. Argon (Ar).
Uses of argon (Ar) include, use in incandescent light bulbs instead of air as it will not react with the tungsten filament even when it is white hot , also useful in metallurgical (metal working) processes, to provide the necessary inert atmosphere for welding titanium, aluminium, stainless steel, and magnesium (they limit the amount of oxygen and water vapour from the join to prevent oxidation).
Argon is under Neon in the periodic table.
Helium is No. 18 on the Periodic Table of Elements meaning it has eighteen protons.
04. Krypton (Kr).
Uses of krypton (Kr) include, creating photo flashes for high-speed photography, advertising signs, as when paired with an electrical charge, krypton glows bright green.
Krypton is under Argon in the periodic table.
Krypton is No. 36 on the Periodic Table of Elements meaning it has thirty six protons.
05. Xenon (Xe).
Xenon (Xe) does not glow when you introduce an electrical current, instead, it flashes a brilliant white light, in terms of its use, it makes for a perfect strobe light. It can also be used for sterilization as its light is such a frequency that it can destroy bacteria on surfaces and in the air. Xenon is an odorless, colorless gas, but when it is put in a vacuum tube and excited with electricity it can glow blue.
Xenon is under krypton in the periodic table.
Xenon is No. 54 on the Periodic Table of Elements meaning it has fifty four protons.
06. Radon (Rn).
Uses of radon (Rn) include, radiotherapy, places such as Bad Gastern in Austria and Onsen in Japan offer a therapy in which people sit for minutes to hours in a high-radon atmosphere, believing (i.e., not proven) that low doses of radiation will boost up their energy.
Radon is under Xenon in the periodic table.
Radon is No. 86 on the Periodic Table of Elements meaning it has eighty six protons.
07. Oganesson (Og).
Oganesson is a radioactive, artificially produced element , it is expected to be a gas and is classified as a non-metal. It is a member of the noble gas group.
The element, No. 118 on the Periodic Table of Elements, had previously been designated ununoctium, a placeholder name that means one-one-eight in Latin. In November 2016, the International Union of Pure and Applied Chemistry approved the name oganesson for element 118.
Since only a few atoms of oganesson have ever been made, it has no practical uses outside of scientific study.
Oganesson is No. 118 on the Periodic Table of Elements meaning it has one hundred and eighteen protons.



