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Chemistry - f-block Question with Solution | TestHub

Chemistryf-blockf-blockEasy2 minPYQ_2019

ChemistryEasysingle choice

Assertion : $Yb^{2 +}$ is more stable as compare to $Gd^{2 +}$ . Reason : The electronic configuration of Gd is [ $Xe] 4 f^{7} 5 d^{2} 6 s^{2}$ .

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Solution:

$Yb^{2 +} = [Xe] 4 f^{14} 5 d^{0} 6 s^{0} Gd^{2 +} = [Xe] 4 f^{7} 5 d^{1} 6 s^{0}$ Because of fully filled $4 f$ orbital, $Yb^{2 +}$ is more stable than $Gd^{2 +}$ .

Stream:AIIMSSubject:ChemistryTopic:f-blockSubtopic:f-block

⏱ 2mℹ️ Source: PYQ_2019

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