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CMC Medical CMC-Medical VELLORE Solved Paper-2013

  • question_answer
    If elements with principal quantum number n > 4 were not allowed in nature than the number of possible elements would be

    A)  32                         

    B)  60     

    C)  10                         

    D)  4

    Correct Answer: B

    Solution :

                    n = 1 represent K-shall and the number of elements having K shall = 2 n = 2 represent L shall and the number of element having L shall = 8 n = 3 represent N shall and the number of elements having A shall = 18 n = 4 represent N shall and the number of element having N shall = 32 Total number =2 + 8 + 18 + 32 = 60


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