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Out of the elements X and Y, which has b...

Out of the elements X and Y, which has bigger atomic radius? Give reason to justify your answer.
(i) X has atomic number 18 and atomic mass 40.
(ii) Y has atomic number 20 and atomic mass 40.

Text Solution

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Radius of Y is bigger than that of X.
In .X. the number of shells is three while in Y it is four.
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