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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
    The Ce (Z = 58) belongs to IIIrd group of periodic table. If it furnish one \[\alpha \] particle to form an element 'X', then X belongs to

    A) IIIrd group          

    B) IInd group

    C) Ist group            

    D) zero group

    Correct Answer: B

    Solution :

    [b] \[_{58}Ce\] is lanthanoid. Lanthanoid are from 57 to 71 all present in IIIrd  group. Hence \[_{58}Ce\] forms \[_{56}X\]  element on emission of one \[\alpha \] particle with belongs to IInd group.


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