What is the cause of lanthanoid contraction?
- APoor shielding effect of outer electrons by $4f$ electrons.
- BEffective shielding effect of outer electrons by $5d$ electrons.
- CSame effective nuclear charge of elements from $Ce$ to $Lu$.
- DImperfect shielding of outer electrons by $4f$ electrons.
Explore More
Similar Questions
Lanthanoid ions with $4f^7$ configuration are :
$A$. $Eu^{2+}$
$B$. $Gd^{3+}$
$C$. $Eu^{3+}$
$D$. $Tb^{3+}$
$E$. $Sm^{2+}$
Choose the correct answer from the options given below :
$A$. $Eu^{2+}$
$B$. $Gd^{3+}$
$C$. $Eu^{3+}$
$D$. $Tb^{3+}$
$E$. $Sm^{2+}$
Choose the correct answer from the options given below :
Which of the following statements is $NOT$ incorrect?
Medium
View SolutionIn $f$-block elements,which orbitals are progressively filled by electrons?
Explain the lanthanoid contraction.
Medium
View SolutionWhich of the following oxidation states is the most common among the lanthanoids?
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo