Lanthanoid contraction is caused due to an in | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Lanthanoid contraction is the steady decrease in the atomic and ionic radii of lanthanoids with an increase in atomic number. This is primarily du

Vedclass · Accepted Answer

Effective nuclear charge

Vedclass · Answer

(C) Lanthanoid contraction is the steady decrease in the atomic and ionic radii of lanthanoids with an increase in atomic number. This is primarily due to the poor shielding effect of $4f$ electrons. As the atomic number increases,the nuclear charge increases by one unit at each step,but the additional electron enters the $4f$ orbital. Since $4f$ electrons have a very poor shielding effect,the effective nuclear charge experienced by the outer electrons increases,causing the electron cloud to be pulled closer to the nucleus,resulting in a decrease in size.

Lanthanoid contraction is caused due to an increase in . . . . . . .

Similar Questions

Name a member of the lanthanoid series which is well known to exhibit $+4$ oxidation state.

On which factors does the stability of an oxidation state in Lanthanoid elements depend?

Which of the following oxidation states is common for all lanthanides?

The pair of lanthanoid ions which are diamagnetic is

Describe the atomic and ionic radii of lanthanoids and explain lanthanoid contraction.

Vedclass Test Series

Exam Paper Generator

Online Exam Module