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RAJASTHAN PMT Rajasthan - PMT Solved Paper-1999

  • question_answer
    An electronic configuration of a metal is 2, 8, 14 and mass number of metal is 56. Then the number of neutron in its nucleus is:

    A)  \[32\]                                  

    B)                         \[30\]   

    C)                         \[34\]                                  

    D)                         \[42\]

    Correct Answer: A

    Solution :

    Neutron = mass number - proton Proton \[=2+8+14=24\] Neutron \[=56-24=32\]


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