Why are zero group elements called noble gases or inert gases?

Why are zero group elements chemically inert ?

Why zero group elements are inert ?

Why are the Gr-18 elements called as inert gases ?

Give scientific reasons : Inert gases (zero group elements ) are called noble gases.

What are zero group elements ? Give the electronic configuration of the first four of them. Why zero group elements are also known as inert gases ?

Why are the elements of group 18 called noble gases?

Which group elements are examples for Noble gases?

Why the noble gases are called inert gases ?