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JEE Main & Advanced AIEEE Solved Paper-2003

  • question_answer
    The radius of \[L{{a}^{3+}}\] (atomic number of \[La=57\]) is \[1.06\overset{o}{\mathop{A}}\,\]. Which one of the following given values will be closest to the radius of \[L{{u}^{3+}}\] (atomic number of \[Lu=71\])?     AIEEE  Solved  Paper-2003      

    A) \[1.60\,\overset{o}{\mathop{A}}\,\]     

    B)       \[1.40\,\overset{o}{\mathop{A}}\,\]     

    C) \[1.06\,\overset{o}{\mathop{A}}\,\]                     

    D) \[0.85\,\overset{o}{\mathop{A}}\,\]

    Correct Answer: D

    Solution :

    Due to lanthanide contraction there occurs net decrease in size. Only one \[0.85\,\overset{o}{\mathop{A}}\,\] is smaller one.


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