JEE Main & Advanced Physics Atomic Physics Question Bank Atomic Structure

  • 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 [IIT 1983; MP PET 1999; RPMT 1999; RPET 2001]

    A)            60  

    B)            32

    C)            4    

    D)            64

    Correct Answer: A

    Solution :

               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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