Question

1) Inert gases in air​

Answer 1

Explanation:

The group 18 elements include helium, neon, argon, krypton, xenon and radon. They are referred to as noble gases or inert gases. The general configuration of the valence shell is ns2np6. All of these elements occur in a free state in the atmosphere.

Answer 2

Answer:

argon is present in air in about 1%

most other noble gases are present, in very teeeeeeeeeeeeeeny tinyyyyyyyy amounts :)