Question

what do u understand by zero valency?​

Answer 1

Answer:

means there is no valence electrons in shell.

Explanation:

The valence or valency of an element is a measure of its combining power with other atoms when it forms chemical compounds or molecules. Noble gas family has zero valency. Helium, Neon, Radon and Argon have zero valency because they have their outer shell completely filled and are chemically inert gas.

Answer 2

zero valancy in the electron