GENERAL KNOWLEDGE

Detailed explanation-1: -The outermost shell of the group 18 elements has eight electrons and has achieved a stable electronic configuration. These gases are unreactive or inert because they do not gain, lose, or share electrons. Because they are found in such small amounts in the earth’s atmosphere, they are also known as noble gases.

Detailed explanation-2: -The elements that make up the family of noble gases include helium, neon, argon, krypton, xenon, and radon.