(B) The correct answer is $(B)$. The ionic radii of trivalent lanthanides do not increase with an increase in the atomic number; instead,they show a s

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

Ionic radii of trivalent lanthanides steadily increase with an increase in the atomic number.

(B) The correct answer is $(B)$. The ionic radii of trivalent lanthanides do not increase with an increase in the atomic number; instead,they show a steady decrease,a phenomenon known as lanthanoid contraction.

Class 12 Chemistry d-and f-Block Elements Lanthanoids and Actinoids

Medium

Which of the following statements concerning lanthanide elements is false?

AIPMT 1994 All AIPMT

A
Lanthanides are separated from one another by ion exchange method.
B
Ionic radii of trivalent lanthanides steadily increase with an increase in the atomic number.
C
All lanthanides are highly dense metals.
D
The most characteristic oxidation state of lanthanide elements is $+3$.