Helium and neon can exist as a single atom.Give reason
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Helium is an inert gas and So, it does not react with any other substances so, the atom of helium is very stable and does not combine with any other atom.
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Explanation:
Helium and neon belong to the noble gas ( inert gas) family in the periodic table
They are the most stable due to having the maximum number of valence electrons their outer shell ( valance shell ) can hold.
Therefore, they rarely react with other elements since they are already stable
Because of these reasons they exists as a single atom
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