Question

define inert-1 marks

Answer 1

gases which do not react at all and have stable condition is called inert gases
hope it helps you

Answer 2

The inert pair effect is the tendency of the two electrons in the outermost atomic sorbital to remain unionized or unshared in compounds of post-transition metals. The term inert pair effect is often used in relation to the increasing stability of oxidation statesthat are two less than the group valency for the heavier elements of groups 13, 14, 15 and 16. The term "inert pair" was first proposed by Nevil Sidgwick in 1927.] The name suggests that the s electrons are more tightly bound to the nucleus and therefore more difficult to
i hope it will help you.