Question

why are zero group elements inert gases

Answer 1

Zero group elements are inert because they have completely filled outermost shells. Neither they have a tendency to lose or gain or share electron/electrons with other elements.

Answer 2

• The elements of group 0 have stable complete octate configuration.
• It means that they do not react with other elements easily, i.e., they have inert behavior.
• Thats why they called as inert gases.