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JIPMER Jipmer Medical Solved Paper-2009

  • question_answer
    The atomic number of an element M is 26. How many electrons are present in the M-shell of the element in its \[{{M}^{3+}}\]state?

    A)  11                                         

    B)  15                         

    C)  14                         

    D)         13

    Correct Answer: D

    Solution :

    \[\begin{matrix}    {} & K & L & M & N  \\    M(26) & 1{{s}^{2}}, & 2{{s}^{2}}2{{p}^{6}}, & 3{{s}^{2}}3{{p}^{6}}3{{d}^{6}}, & 4{{s}^{2}}  \\    {{M}^{3+}} & 1{{s}^{2}}, & 2{{s}^{2}}2{{p}^{6}}, & 3{{s}^{2}}3{{p}^{6}}3{{d}^{5}}, & 4{{s}^{0}}  \\ \end{matrix}\] Hence, 13 electrons are present in the M-shell of \[{{M}^{3+}}\]state.


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