Question

Write any two elements whose valency

is zero?​

Answer 1

Answer:

Helium, Neon, Radon and Argon have zero valency because they have their outer shell completely filled and are chemically inert gas.

Answer 2

Answer:

He , Ar , Ne

Explanation:

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.