Where do you think the noble gases are placed in separate group? Name any two noble gases
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The groups are elements with the same number of electrons in the outer shell at least for the more common elements. 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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The groups are elements with the same number of electrons in the outer shell at least for the more common elements. Thenoble 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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