Chemistry - f-block Question with Solution | TestHub

Chemistryf-blockf-blockMedium2 minPYQ_2020

ChemistryMediumsingle choice

Arrange $Y b^{+ 3}$ , $C e^{+ 3}, L a^{+ 3}, P m^{+ 3}$ ions in increasing order of their ionic radii

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Answer:

Solution:

Due to Lanthanoid contraction their is greater decrease in ionic radii of elements in lanthanide series because of poor shielding of nuclear charge by 4f electrons, hence the order will be $Y b^{+ 3} < P m^{3 +} < C e^{+ 3} < L a^{3 +}$

Stream:NTA_ABHYASSubject:ChemistryTopic:f-blockSubtopic:f-block

⏱ 2mℹ️ Source: PYQ_2020

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