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9th Class Science Structure of the Atom Question Bank Structure of the Atom

  • question_answer
    Which of the following ions has the same number of electrons as a krypton atom with atomic number\[36\]?

    A)  Chlorine                       

    B)  Sodium

    C)  Rubidium           

    D)         Xenon

    Correct Answer: C

    Solution :

     \[Kr\] has \[36\] electrons. \[Rb\] has \[37\] electrons but when it forms \[R{{b}^{+}}\] (it is a Group I element), there are only \[36\] electrons.


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