Helium atom has 2 electrons in its valence shell but it’s valency is not 2.Explain
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A helium atom has only one shell (K shell) which can have a maximum of 2 electrons. Thus, its shell is already complete, called a duplet. It can neither lose electrons nor gain electrons. ... Helium doesn't lose or gain any electron from its valence shell hence the valency of helium is zero.
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A helium atom has only one shell (K shell) which can have a maximum of 2 electrons. Thus, its shell is already complete, called a duplet. It can neither lose electrons nor gain electrons. ... Helium doesn't lose or gain any electron from its valence shell hence the valency of helium is zero.
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