why do you think the noblegas are placed in a separate group? name any tow noble gases translate into punjabi
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the Noble gases are already present in the separate grp
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All the noble gas elements have zero valency and placed in zero group with similar chemical properties. ... The noble gases like helium,neon. argon, krypton and xenon are placed in a separate group because these are inert ( un-reactive ) and present in very low concentration in the atmosphere.
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