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April 20, 2014

Homework Help: Chemistry

Posted by Maria on Friday, December 14, 2012 at 1:46am.

What trends the atomic radii of group 2A ?what trends the atomic radii of period 3? Why this trend occurs?
Ans
Atomic radii of group 2A increases . Atomic radii of period 3 decreases .
I don't know how to answer the last question!! Please help me !

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