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The electron enters into 4 s orbital aft...

The electron enters into 4 s orbital after filling 3 p orbital but not into 3d . Explain the reason .

Text Solution

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Based on (n + l) values energy value of 3d orbitals is 3 + 2 = 5 , energy value of 4s orbitals is 4 + 0 = 4
The energy level of 4s orbital is less than the 3d orbital according to the Aufbau principle electrons enters into lower energy orbital first .
Thats why electrons into 4s after filling 3p , but not into 3d .
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Knowledge Check

  • The total number of electrons present in all the 's' orbitals, all the 'p' orbitals and all the 'd' orbitals of cesium ion are respectively

    A
    8,26,10
    B
    10,24,20
    C
    8,22,24
    D
    12,20,22

  • The number of radial nodes present in 3p orbital is

    A
    0
    B
    1
    C
    2
    D
    3

  • The total number of electrons present in all the 's' orbitals, all the 'p' ortitals and all the 'd' orbitals of cesium ion are respectively

    A
    8, 26, 10
    B
    10, 24, 20
    C
    8, 22, 24
    D
    12, 20, 22

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