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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Atomic number, Mass number Atomic species

  • question_answer
    An element has electronic configuration 2, 8, 18, 1. If its atomic weight is 63, then how many neutrons will be present in its nucleus               

    A)                 30          

    B)                 32

    C)                 34          

    D)                 33

    Correct Answer: C

    Solution :

                    \[Cu_{29}^{63}\] Number of neutrons = atomic mass ? atomic number = 63 ? 29 = 34.


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