Question

why were inert gases placed in a separate group? write the reasons.​

Answer 1

Noble gases like He, Ne, Kr, Xe and Rn are placed in a separate group because of the following reasons: - They are extremely unreactive. - They donot combine with any other element of the periodic table. - All the noble gas elements have zero valency and placed in zero group with similar chemical properties.

Answer 2

Answer:

-->the inert gases elements have the zero valency..

-->these are placed in zero group with similar chemical properties

-->these inert gases are unreactive

-->these inert gases do not combine with any other element in periodic table.