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EAMCET Medical EAMCET Medical Solved Paper-2010

  • question_answer
    The radial probability distribution curve obtained for an orbital wave function \[(\psi )\] has 3 peaks and 2 radial nodes. The valence electron of which one of the following metals does this wave function \[(\psi )\]correspond to?

    A)  Cu                         

    B)   Li     

    C)  K                                           

    D)  Na

    Correct Answer: D

    Solution :

                     Since, the radial probability distribution curve has 3 peaks, it means that for it \[n=3\]and \[l=0.\] Moreover, it has two radial nodes ie, \[n-l-1=2\] (which also satisfied previous condition, ie, \[3-0-1=2.\]Hence, the valence electron of the metal must present in \[3s-\]orbital.  The outer electronic configuration of the given metals is \[_{29}Cu=3{{d}^{10}}4{{s}^{1}}\] \[ & 3Li=2{{s}^{1}}\] \[_{19}K=4{{s}^{1}}\] \[_{11}Na=3{{s}^{1}}\] Thus, the given wave function corresponds to the valence electrons of the sodium metal.


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