Question
Sun February 27, 2011 By: Apoorv Kumar
 

Why is argon bigger in size than chlorine, when argon is next to chlorine in the third period and the size of element decreases on moving from left to right in a period?

Expert Reply
Mon February 28, 2011
Dear Student
 
Argon has completely fullfilled outer shell. So, the size of argon is greater than chlorine because of the interelectronic repulsions start taking palce when an atom attain its octet
 
We hope that clarifies your query.
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