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CBSE Class 9 Answered

why element Helium and Argon are chemically inactive?
Asked by snaik0856 | 29 Dec, 2019, 09:47: PM
Expert Answer
Helium has 2 electrons in its outermost orbit and argon has 8 valence elctrons in its outermost orbit.
 
That is helim and argon have stable electronic configuration. So these elements have no tendency to gain or lose electrons.
Therefore these elements are unreactive that is chemically inert.
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