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as we move from left to right in a period in modern periodic table , the atomic size decreases but why noble gases then have largest atomic size .please explain in detail .

Asked by Sanchit Sharma 2nd March 2015, 6:20 PM
Answered by Expert
Answer:

For noble gase atomic size is expressed in terms of van der Waal’s radii.

In case of other elements of the period, atomic size is either metallic radii or covalent radii.

Since the van der Waal’s radii are larger than the metallic as well as covalent radii, the atomic size of the noble gases is quite large.

 

Answered by Expert 2nd March 2015, 6:55 PM
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