Answer :

Due to poor f orbital shielding, effective nuclear charge increases and there is a contraction in size of the third row elements.This contraction in size is called Lanthanide contraction. The atomic radii of second and third rows are almost similar and therefore they resemble each other more.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

When a chromite oChemistry - Exemplar

Give reasonChemistry - Board Papers