Banking Chemistry Structure of Atom Question Bank Structure of Atom

  • question_answer The atomic number of an element is 11 and its mass number is 23. The correct order representing the number of electrons, protons and neutrons respectively in this atom is

    A)  11, 11, 12                      

    B)  11, 12, 11

    C)  12, 11, 11           

    D)        23, 11, 23.

    Correct Answer: A

    Solution :

     no. of proton = At no.= number of \[{{e}^{-}}\] =11 no. of p+ no. of n = Atomic mass \[\therefore \] no. of \[n=13-11=12\]


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