Zeff of 3s electron in Zn is:

  1. A

    11.25

  2. B

    18.75

  3. C

    25.65

  4. D

    4.35

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    Solution:

    1s22s22p63s23p63d104s2σ=(2×1)+(8×0.85)+(7×0.35)σ=2+6.8+2.45σ=11.25

     Hence, Zeff =Zσ=3011.25=18.75

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