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Why are the elements of group 18 called zero valent?

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asked Jan 18, 2018 in Chemistry by Kundan kumar (49,132 points) ● 34 ● 381 ● 1016
Why are the elements of group 18 called zero valent?

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answered Jan 18, 2018 by Vikash Kumar (144,729 points) ● 8 ● 11 ● 21
selected Jan 18, 2018 by Kundan kumar
 
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Group 18 elements have their outermost shells completely filled and the atoms of these elements have no tendency to gain or lose electrons. Thus, the elements of this group are zero valent and almost unreactive.

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