Helium neon and Argon are called inert gases are noble gas because they have complete its duplet as well as Octate. and no other element like Helium neon and Argon complete its octate and duplete. in the 18th period all element are inert. Which gas does not exist in air?
Answer: because the flu is not liquid it is air born even in your body it is airborn so it floats through your orgons and through any thing in its way even through the heart
