Banking Chemistry Structure of Atom Question Bank Structure of Atom

  • question_answer Which of the following describes an isotope with a mass number of 99 that contains 56 neutrons in its nucleus?

    A)  \[_{56}^{99}Ba\]                   

    B)  \[_{56}^{43}Ba\]

    C)  \[_{43}^{99}Tc\]                      

    D)  \[_{43}^{56}Tc\]

    Correct Answer: C

    Solution :

     Given mass number (Z) = 99 no. of neutrons =56 \[\therefore \] no. of protons = atomic number = 99 - 56 = 43 i.e. \[_{43}T{{C}^{99}}\]


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