RAJASTHAN PMT Rajasthan - PMT Solved Paper-1997

  • question_answer
    Which element does not has neutron in its nucleus?

    A)  \[Li\]                    

    B)                         \[H\] 

    C)                         \[O\]                                   

    D)                         \[C\]

    Correct Answer: B

    Solution :

    The neutrons are not present in \[_{1}{{H}^{1}}\]. Neutron = atomic mass - atomic number                 \[=1-1=0\]


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