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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Quantum number, Electronic configuration and Shape of orbitals

  • question_answer
    The following has zero valency  [DPMT 1991]

    A)                 Sodium

    B)                 Beryllium

    C)                 Aluminium         

    D)                 Krypton

    Correct Answer: D

    Solution :

                    Kr has zero valency because it contains 8 electrons in outermost shell.


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