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Punjab Medical Punjab - MET Solved Paper-2007

  • question_answer
    An  atom  has  electronic  configuration\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{3}}4{{s}^{2}}\], you will place it in

    A)  fifth group        

    B)  fifteenth group

    C)  second group  

    D)  third group

    Correct Answer: A

    Solution :

    An atom has electronic configuration\[1{{s}^{2}},\,\,2{{s}^{2}}2{{p}^{6}},\,\,3{{s}^{2}}3{{p}^{6}}3{{d}^{3}},\,\,4{{s}^{2}}\] It is a member of \[d-\]block element because the last electron is filled in \[d-\]subshell as \[3{{d}^{3}}\] and the following electronic configuration is possible for \[d-\]subshell as\[(n-1)\]\[d-\]subshell as\[(n-1){{d}^{1to10}}\]
    Group No. III B IVB VB VIB VIIB VIII VIII VIII IB IIB
    (13) (14) (15) (16) (17) (18) (19) (20) (21) (22)
    \[n{{s}^{2}}(n-1){{s}^{2}}{{p}^{6}}\] \[{{d}^{1}}\] \[{{d}^{2}}\] \[{{d}^{3}}\] \[{{d}^{4}}\] \[{{d}^{5}}\] \[{{d}^{6}}\] \[{{d}^{7}}\] \[{{d}^{8}}\] \[{{d}^{9}}\] \[{{d}^{10}}\]


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