JEE Main & Advanced Physics Atomic Physics Question Bank Topic Test - Atomic Physics

  • question_answer
    If in nature there may not be an element for which the principal quantum number n > 4, then the total possible number of elements will be

    A) 60

    B) 32

    C) 4

    D) 64

    Correct Answer: A

    Solution :

    [a] For n=1, maximum number of states \[=2{{n}^{2}}=2\] and for n = 2, 3, 4, maximum number of states would be 8, 18, 32 respectively, Hence number of possible elements
    = 2 + 8 + 18 + 32 = 60.


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