Helium
Helium is an element with symbol He and atomic number 2. It is located in group 8A of the periodic table and exists in gas form.
Helium, which is the lightest gas after hydrogen, does not react, although it is colorless and odorless. That's why it is inactive. The relative atomic mass is 4.0026. It is a gas at room temperature and is impossible to see in other forms under natural conditions. However, thanks to the temperatures that can be achieved under laboratory conditions, it is possible to see it as solid and liquid. It is used in hot air balloons and zeppelins because it is lighter than air. Its atomic diameter is 49 pm and it has no electronegativity. The oxidation step is zero. Since it is a stable compound, it does not compound with other elements and does not react with oxygen. For this reason, helium is not involved in the combustion reaction.
Helium mostly plays a role in pressurizing hot balloons and zeppelins, diver tubes and liquid rocket fuels.
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