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  2. Noble gas - Wikipedia

    en.wikipedia.org/wiki/Noble_gas

    The noble gases have also been referred to as inert gases, but this label is deprecated as many noble gas compounds are now known. [6] Rare gases is another term that was used, [ 7 ] but this is also inaccurate because argon forms a fairly considerable part (0.94% by volume, 1.3% by mass) of the Earth's atmosphere due to decay of radioactive ...

  3. Noble gas compound - Wikipedia

    en.wikipedia.org/wiki/Noble_gas_compound

    Structure of a noble-gas atom caged within a buckminsterfullerene (C 60) molecule. Noble gases can also form endohedral fullerene compounds where the noble gas atom is trapped inside a fullerene molecule. In 1993, it was discovered that when C 60 is exposed to a pressure of around 3 bar of He or Ne, the complexes He@C 60 and Ne@C 60 are formed ...

  4. Chemically inert - Wikipedia

    en.wikipedia.org/wiki/Chemically_inert

    The noble gases (helium, neon, argon, krypton, xenon and radon) were previously known as 'inert gases' because of their perceived lack of participation in any chemical reactions. The reason for this is that their outermost electron shells (valence shells) are completely filled, so that they have little tendency to gain or lose electrons.

  5. Nonmetal - Wikipedia

    en.wikipedia.org/wiki/Nonmetal

    Chemically, the noble gases exhibit relatively high ionization energies, negligible or negative electron affinities, and high to very high electronegativities. The number of compounds formed by noble gases is in the hundreds and continues to expand, [ 131 ] with most of these compounds involving the combination of oxygen or fluorine with either ...

  6. List of nonmetal monographs - Wikipedia

    en.wikipedia.org/wiki/List_of_nonmetal_monographs

    Fifteen nonmetals including B, Si, As, Sb and Se (the six noble gases were not then known; Ge had only been discovered in 1886). Te is shown in a list of the chemical elements but not mentioned elsewhere. Gmelin L 1849, Handbook of Chemistry, vol. 2, Non-metallic elements, H Watts (trans.), Cavendish Society, London.

  7. Gas-filled tube - Wikipedia

    en.wikipedia.org/wiki/Gas-filled_tube

    Noble gas discharge tubes; from left to right: helium, neon, argon, krypton, xenon. Noble gases are frequently used in tubes for many purposes, from lighting to switching. Pure noble gases are employed in switching tubes. Noble-gas-filled thyratrons have better electrical parameters than mercury-based ones. [3]

  8. Noble elements - Wikipedia

    en.wikipedia.org/wiki/Noble_elements

    In other projects Wikidata item; Appearance. move to sidebar hide. Elements that are considered "noble" include: noble gases; noble metals; This page was ...

  9. Category:Noble gas compounds - Wikipedia

    en.wikipedia.org/wiki/Category:Noble_gas_compounds

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