Which one of the following statements 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 characteristic oxidation state of lanthanides elements is +3

Correct Answer:

The ionic radii of trivalent lanthanides steadily increase with increase in atomic number

Explanation:

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