NEET AIPMT SOLVED PAPER 2002

  • question_answer
                    General electronic configuration of lanthanides are:                                                                       

    A)                 \[(n-2){{f}^{1-14}}(n-1){{s}^{2}}{{p}^{6}}{{d}^{0-1}}n{{s}^{2}}\] 

    B)                 \[(n-2){{f}^{10-14}}(n-1){{d}^{0-1}}n{{s}^{2}}\]

    C)                 \[(n-2){{f}^{0-14}}(n-1){{d}^{10}}n{{s}^{2}}\]                     

    D)                 \[(n-2){{d}^{0-1}}(n-1){{f}^{1-14}}n{{s}^{2}}\]

    Correct Answer: A

    Solution :

                    In lanthanides (At. no. of elements 58 to 71) the electronic configuration of three outermost shell in                 \[(n-2){{f}^{1-14}},\,(n-1){{s}^{2}}{{p}^{6}}{{d}^{0\,to\,1}},\,n{{s}^{2}}\]


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