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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Atomic number, Mass number Atomic species

  • question_answer
    The nucleus of the element \[_{21}{{E}^{45}}\] contains

    A)                 45 protons and 21 neutrons

    B)                 21 protons and 24 neutrons

    C)                 21 protons and 45 neutrons

    D)                 24 protons and 21 neutrons

    Correct Answer: B

    Solution :

                    21 Protons and 24 Neutrons are present in nucleus and element is Sc.


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