Maximum value of n+l+m for the last unpaired electron in an element present in 17th group and 4th period of periodic table:

  1. A

    4

  2. B

    5

  3. C

    6

  4. D

    7

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    Solution:

    For 17th group and 4th period of periodic table the value of the principal(n),azimuthal(l) and magnetic quantum number (m) is 4,1 and +1.

    n=4

    l=1

     m=+1

    The maximum value of n+l+m for the last unpaired electron in an element is found by the calculation,

    =n+l+m =4+1+1 =6

    Hence he maximum value of n+l+m is 6.

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