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CBSE Class 12-science Answered

Give reason- Size of trivalent decreases with the increase in atomic number?
Asked by sheetu.k.aggarwal | 15 Feb, 2011, 09:23: PM
Expert Answer
Dear Student
 
The radii of the trivalent ions decrease slightly as the atomic number increases. The reason is that whereas nuclear +ve charge goes on increasing as the atomic number increases, the  electronic cloud experiences more inside pull (as the charge on the nucleus increases), all electrons are pulled in closer to the nucleus due to the occurrence of incompletely filled anti-penultimate shell so that the radii of the trivalent-ions decrease slightly as the atomic number increases.
 
We hope that clarifies your query.
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Team
Topperlearning
Answered by | 17 Feb, 2011, 08:50: PM
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