The term "noble gas" is a direct translation of the German term "Edelgas".
This is the same word "Edel" as in "Edelweiss", which is a famous, alpine flower. Noble gases are also called inert gases.
Noble gases are gases at ordinary room temperature and pressure. This leads to the interesting question of what happens when we liquefy or freeze the Noble gases.
Helium can be liquefied at standard atmospheric pressure. Liquid helium has been studied by Baku-born Soviet physicist Lev Landau and American Richard Feynman.
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