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General electronic configuration of lant...

General electronic configuration of lanthanides is

A

`(n - 2) f^(1-14) (n - 1) s^(2)p^(6) d^(0-1) ns^(2)`

B

`(n - 2) f^(10-14) (n - 1) d^(0-1) ns^(2)`

C

`(n - 2) f^(0-14) (n - 1) d^(10) ns^(2)`

D

`(n - 2) d^(0-1) (n - 1) f^(0-14) ns^(1)`

Text Solution

Verified by Experts

The correct Answer is:
A
It might be expected that the 14 elements form Ce to Lu would be formed be formed by adding 1, 2, 3, ….. 14 electrons into the 4f level. However, it is energetically favourable to move the single 5d electron into the 4f level in most of the elements, but not in the cases of Ce, Gd and Lu. Thus, the general valence shell electronic configuration is: (n - 2) `f^(0-14)` (n - 1) `d^(0-1) n^(2)` .
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Knowledge Check

  • The general electronic configuration of lanthanide is

    A
    `(n-2)f^(1-14)(n-1)s^(2)p^(6)d^(0-1)ns^(2)`
    B
    `(n-2)f^(0-14)(n-1)d^(0-1)ns^(2)`
    C
    `((n-2)f^(0-14)(n-1)d^(10)ns^(2)`
    D
    `(n-2)d^(0-1)(n-1)f^(0-14)ns^(2)`

  • The expected general, electronic configuration of lanthanons is

    A
    `6s^(2), 4^(0-14) , 5d^(1)`
    B
    `6s^(2), 4f^(1-14) , 5d^(1)`
    C
    `6s^(2), 4f^(0-14), 5 d^(0-1)`
    D
    `6s^(2), 4f^(1-14), 5d ^(0-1)`

  • The general valence shell electronic configuration of lanthanoides is represented by

    A
    `(n-2)f^(1-14)(n-1)d^(0-1)ns^(2)`
    B
    `(n-2)f^(1-14)(n-1)d^(10)ns^(2)`
    C
    `(n-2)f^(0-14)(n-1)d^(0-2)ns^(2)`
    D
    `(n-2)f^(1-14)(n-2)d^(0-5)ns^(2)`

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