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noble gases have stable configuration,having ns2 np6 or completely filled available orbitals they r 18 group members they are called as 1.Inert gases (earlier called) bec of their chemical inertness i.e non reactivity under normal conditions 2.Noble gases implies that they have little chemical reactivity, thus paralleling the use of this term in describing the chemistry of of certain less reactive metals like gold, platinum also called as noble metals 3. Rare gases as they r present in or around earth in small amounts
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