Question

Why is the valency of noble gases zero?​

Answer 1

Octet means that outer most orbit has complete eight electrons to stay stable. Atoms lose or gain electrons to become stable. The noble gases are already stable, so their tendency to gain or lose electrons is zero. Hence, their valency is also zero.

Answer 2

Octet means that outer most orbit has complete eight electrons to stay stable. Atoms lose or gain electrons to become stable. The noble gases are already stable, so their tendency to gain or lose electrons is zero. Hence, their valency is also zero.