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JCECE Medical JCECE Medical Solved Paper-2002

  • question_answer
    The element with electronic configuration \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}},4{{s}^{2}}\]shows same property as:

    A)  Mo

    B)  Rb

    C)  Ca

    D)  Sr

    Correct Answer: D

    Solution :

     Key Idea: The block and group of element is decided by its electronic configuration. Elements belonging to same  group  have  same configuration and same properties. Given \[1{{s}^{2}},2{{s}^{2}},2{{p}^{6}},3{{s}^{2}},3{{p}^{6}},4{{s}^{2}}\]is configuration of element \[\therefore \]Atomic number of element is = 20 \[\therefore \]It is Ca.                         Ca and Sr belong to same group. \[\therefore \]Ca and Sr show same properties.


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