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EAMCET Medical EAMCET Medical Solved Paper-2004

  • question_answer
    \[_{19}{{K}^{39}}\]and \[\,{{  }_{20}}C{{a}^{40}}\]are \[\xrightarrow{{}}{{\,}_{19}}{{K}^{39}}\,{{\,}_{20}}C{{a}^{40}}\]

    A)  isotopes                             

    B)  isobars

    C)  isotones                             

    D)  isodiaphers

    Correct Answer: C

    Solution :

                     Isotones : Nuclei having different atomic number and different mass number but having same number of neutrons are known as isotones e.g., In \[{{\,}_{\text{19}}}{{\text{K}}^{\text{39}}}\]number of neutrons = 39 -19 = 20 In   \[{{\,}_{20}}\text{C}{{\text{a}}^{40}}\]   number   of   neutrons = 40 - 20 = 20 Both have same number of neutrons. So, these are isotones.


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