Question

how shielding effect affect atomic size in lanthanides

Answer 1

This effect is particularly pronounced in the case oflanthanides, as the 4f subshell which is filled across these elements is not very effective atshielding the outer shell (n=5 and n=6) electrons. Thus theshielding effect is less able to counter the decrease in radius caused by increasing nuclear charge.

Answer 2

Hey guys this is Nitish singh
U can follow me on
Instagram user name
akrk1811
Shielding and its Effects on Atomic Radius. The Lanthanide Contraction is the result of a poor shielding effect of the 4f electrons. The shielding effectis described as the phenomenon by which the inner-shell electrons shieldthe outer-shell electrons so they are not effected by nuclear charge.
hop its helpful
mark me as brainlist