Question

In context of the lanthanoids , which of the following statement is not correct?
A. There is a gradual decrease in the radii of the members with increasing atomic number in the series
B. All the member exhibit `+3` oxidation state
C. Availability of `4f` electrons result in the formation of compounds in `+4` state for all member of the series
D.

Answer 1

Correct Answer - 4
Availability of `4f` electrons donot results in the formation of compounds in `+4` state for all the members of the series.