JEE Main & Advanced Chemistry Structure of Atom Question Bank Quantum number, Electronic configuration and Shape of orbitals

  • question_answer The total number of electrons present in all the \[p\]-orbitals of bromine are                                     [MP PET 1994]

    A)                 Five       

    B)                 Eighteen

    C)                 Seventeen         

    D)                 Thirty five

    Correct Answer: C

    Solution :

               The atomic number of bromine is 35 and the electronic configuration of \[Br\] is \[B{{r}_{35}}=\,1{{s}^{2}},\,2{{s}^{2}},\,2{{p}^{6}},\,3{{s}^{2}},\,3{{p}^{6}},\,3{{d}^{10}},\,4{{s}^{2}},\,4{{p}^{5}}\]            total electron present in p-orbitals of \[Br\] is ?                                 \[2{{p}^{6}}+3{{p}^{6}}+4{{p}^{5}}=17.\]

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