10th Class Science Periodic Classification of Elements Question Bank Periodic Classification of Elements

  • question_answer
    What is the range of atomic numbers of lanthanoid series of elements?

    A) 90-103                                 

    B) 89-102      

    C) 58-71                                   

    D) 71-103

    Correct Answer: C

    Solution :

    Lanthanoid series of elements range from 58 to 71.


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