Reason of lanthanoid contraction is

Question

Reason of lanthanoid contraction is (A) Negligible screening effect of 'f' orbitals (B) Decreasing screening effect (C) Increasing nuclear charge (D) Decreasing nuclear charge

Tardigrade Admin · Accepted Answer

As inner d or f orbital electrons are located deep inside due to highly diffused shapes of these orbitals. So they exert low repulsion that is poor screening. It means due to poor shielding of f-orbitals nucleus will exert a stronger attraction causing lanthanoid contraction.

Q. Reason of lanthanoid contraction is

Negligible screening effect of 'f' orbitals

Decreasing screening effect

Increasing nuclear charge

Decreasing nuclear charge

As inner d or f orbital electrons are located deep inside due to highly diffused shapes of these orbitals. So they exert low repulsion that is poor screening. It means due to poor shielding of f-orbitals nucleus will exert a stronger attraction causing lanthanoid contraction.