Why do Helium, Neon and Argon …
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Yogita Ingle 5 years, 1 month ago
Helium has two electrons in its energy shell, while argon and neon have 8 electrons in their valence shells. As these have maximum number of electrons in their valence shells, they do not have any tendency to combine with other elements. Hence, they have a valency equal to zero.
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