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JCECE Engineering JCECE Engineering Solved Paper-2013

  • question_answer
    The electronic configuration of a transition element \['X'\] in \[+3\] oxidation state is\[[Ar]3{{d}^{5}}\]. What is its atomic number?

    A) \[24\]                                   

    B) \[25\]

    C) \[26\]                                   

    D)  \[27\]

    Correct Answer: C

    Solution :

    \[{{X}^{3+}}={{[Ar]}^{18}}3{{d}^{5}}=23\]electrons. As \[{{X}^{3+}}\] ion is formed by the loss of 3 electrons from \[X,\,\,\,X\] will have 26 electrons. At number of\[X=26\].


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