The energy of an electron in a hydrogen atom is determined solely by its :

  1. A

    Principal quantum number

  2. B

    Subsidiary quantum number

  3. C

    (n+l) value 

  4. D

    None of these

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    Solution:

    The energy of an electron in a hydrogen atom is determined solely by its principal quantum number.

    The primary quantum number n value that best describes the energy state of an electron of a hydrogen atom is what determines the energy of the electron. Where the quantization of the energy levels is done by the quantum number n=1,2,3,… They therefore represent discrete energy values proportional to 1n2.

    Hence, option A is correct.

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