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Which of the following statement concerning lanthanides elements is false

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Lanthanides are separated from one another by ion exchange method

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

All lanthanides are highly dense metals

More characteristic oxidation state of lanthanide elements is +3

answer is B.

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Detailed Solution

Ionic radius of trivalent lanthanides almost remains constant with increase in the atomic number.

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