Which of the following statement concerning lanthanides elements is false.

Options

A. Lanthanides are separated from one another by ion exchange methods
B. The ionic radii of trivalent lanthanides steadily increase with increase in atomic number
C. All lanthanides are highly dense metals
D. Most typical oxidation of lanthanides is +3

Answer

B

Explanation

The ionic radii of trivalent lanthanides steadily decrease with increase in atomic number because of increase nuclear charge.