Question

Give an example of: An inert gas(At. no <20)

Answer 1

xenon and etc are the example of inert gas

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Answer 2

Answer : Helium, neon and argon are the inert gases.

Explanation :

Inert gas : Inert gas is also known as noble gas. As there are six inert gases which are, helium, neon, argon, krypton, xenon and radon. They belongs to group 18. They are colorless, odorless and mono-atomic gases.

Elements      Atomic number

Helium                    2

Neon                      10

Argon                     18

Krypton                  36

Xenon                    54

Radon                     86

Hence, Helium, neon and argon are the inert gases whose atomic number less than 20.