why elements of group 18 are called zero group?
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Answered by
33
The elements in group 18 have octetrule , means their last cell is already filled and they have no valency that's why it is called zero group.
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20
The Valence shell of the elements of this group is completely filled. And the Valency of elements in this group is Zero. They are non reactive - also called as inert gas elements. All elements have attained octet expect helium ( which has attained duplet i.e., it contains 2 electrons in its outer most shell. )
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