What is inert gas?

The inert gas, also known as noble gas are those gases that do not react with many substances or do not undergo chemical reactions under a set of given conditions.

It consists of seven chemical elements that make up Group 18 of the periodic table. 

These seven elements are Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn), and Oganesson (Og). 

These gases are tasteless, colorless, odorless, and non-flammable gases.