Noble gases are chemically inert meaning they can exist in nature alone or chemically stable. Apparently, if you force then to react, certain amount of energy is required to attain that status. Chemically, they are inert because their outer shell is full with valence electrons.Among the noble gases, only helium and neon are actually inert. Other noble gases tend to react with other compounds under very specific conditions. But they do not react with among each other hence with the other gases such as fluorine and oxygen.
As the molecular weight of the noble gas increase, the first ionization energy is decreased. This also means that the capacity of the gas to donate electron/s for chemical reaction is enhanced. Therefore, larger noble gases tend to be reactive, again in certain conditions.
He -> no specific reactions
Ne -> not yet approved for possible reactions
Ar -> reacts with Fluorine
Kr -> reacts with Fluorine
Xe -> Reacts with Fluorine and Oxygen; Reactions with Chlorine is found to be unstable and under further experimentations.
Rn -> Reacts with Fluorine
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