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NEET Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank Self Evaluation Test - The d-and f-Block Elements

  • question_answer
    In which of the following lanthanoids oxidation state +2 is most stable?

    A) Ce                   

    B) Eu   

    C) Tb                               

    D) Dy

    Correct Answer: B

    Solution :

    [b] \[E{{u}^{2+}}\] has electronic configuration \[\left[ Xe \right]4{{f}^{7}}\]hence stable due to half-filled atomic orbitals.


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