Which of the following statements regarding Lanthanides is false?
- AAll lanthanides are solid at room temperature
- BTheir usual oxidation state is $+3$
- CThey can be separated from one another by ion-exchange method
- DIonic radii of trivalent lanthanides steadily increases with increase in atomic number
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Similar Questions
Determine whether the following statements are True $(T)$ or False $(F)$:
$(a)$ Actinoid contraction is greater than lanthanoid contraction.
$(b)$ Actinoids are elements of the $4f$ series.
$(c)$ All actinoid elements have a $7s^2$ configuration.
$(a)$ Actinoid contraction is greater than lanthanoid contraction.
$(b)$ Actinoids are elements of the $4f$ series.
$(c)$ All actinoid elements have a $7s^2$ configuration.
Difficult
View SolutionWhich of the following elements shows the maximum number of different oxidation states in its compounds?
MediumAIPMT 1998
View SolutionWhat is the number of unpaired electrons present in $f$-orbital at $+3$ oxidation state of $Lu (Z=71)$?
The pair of lanthanides in which both elements have high third-ionization energy is:
Larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids,the main reason being
MediumAIEEE 2008
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