What will be the valency of elements in group 18? What does this imply about their reactivity?
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Answer:
Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level.
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Explanation:
Valency of grp 18 elements is 0.This implies that they are really inert and they rarely react to form any compounds
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