Which one of the following statements concerning lanthanides elements

1.	Which one of the following statements concerning lanthanides elements is false [AMU 2001]
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» C. All lanthanides are highly dense metals

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Which one of the following statements concerning lanthanides elements is false [AMU 2001]

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