Lanthanide contraction occurs because
- A$f-$ orbital electrons are easily lost
- B$f-$ orbital are incompletely filled
- C$f-$ orbital do not come out on the surface of atom and are buried inside
- D$f-$ orbital electrons are poor shielders of nuclear charge
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Similar Questions
In lanthanides,with an increase in atomic number,the atomic radius decreases,except for the element $\underline{X}$. What is $\underline{X}$?
Which is the correct order of ionic sizes $(At. \, No. : Ce = 58, Sn = 50, Yb = 70, Lu = 71)$?
MediumAIEEE 2002
View SolutionKnowing that the chemistry of lanthanoids $(Ln)$ is dominated by its $+3$ oxidation state,which of the following statements is incorrect?
The trivalent ion having the largest size in the lanthanide series is:
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View SolutionWhich pair of actinides exhibit the highest oxidation state of $+7$?
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