Question

Why to helium and neon got zero valency ​

Answer 1

Answer:

because they have satisfied the need to be noble gas which is there Valence electron is 8 of neon and 2 of helium .so it's valency is zero.

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Answer 2

Answer:

• The valency of helium is 0.
• It does not exchange or share electrons to form bonds with any other molecules. Helium has one shell (k) which requires two electrons and helium having two-electron so the outermost shell is completely filled and helium has zero valency. Therefore its valency is taken as zero.