Which of the following statement concerning lanthanides elements is fals

Options

(a) All lanthanides are highly dense metals
(b) More characteristic oxidation state or lanthanides elements is +3
(c) Lanthanides are separated from one another by ion exchange method
(d) Ionic radii of trivalent lanthanides steadily increases with increase in atomic number

Correct Answer:

Ionic radii of trivalent lanthanides steadily increases with increase in atomic number

Explanation:

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