Which of the following statement concerning lanthanides elements is fa

1.	Which of the following statement concerning lanthanides elements is false [CBSE PMT 1994]
A.	Lanthanides are separated from one another by ion exchange method
B.	Ionic radii of trivalent lanthanides steadily increases with increase in the atomic number
C.	All lanthanides are highly dense metals
D.	More characteristic oxidation state of lanthanide elements is +3
Answer» C. All lanthanides are highly dense metals

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