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Outer electronic configuration of K, Cu,...

Outer electronic configuration of `K, Cu`, and `Cr` are, respectively,

A

`4s^(1),3d^(10), 3d^(5)`

B

`4s^(1), 3d^(10), 3d^(4)`

C

`4s^(1), 3d^(9), 3d^(4)`

D

`4s^(1), 3d^(9), 3d^(4)`

Text Solution

Verified by Experts

The correct Answer is:
A
`K(Z = 19):1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(1)`or `[Ar] 4s^(1)`
`Cr(Z = 24):1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3s^(5)4s^(1)`or `[Ar]3s^(5)4s^(1)`
`Cu(Z = 29):1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3s^(10)4s^(1)`or `[Ar] 3d^(10)4s^(1)`
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Knowledge Check

  • The electronic configuration of Cr is

    A
    2, 8, 13, 1
    B
    2, 8, 14
    C
    2, 8, 12, 2
    D
    2, 8, 10,4

  • The electronic configuration of Cr is

    A
    2,8,13,1
    B
    2,8,14
    C
    2,8,12,2
    D
    2,8,10,4

  • The electronic configuration of Cu is

    A
    `3d^(9)4s^(2)`
    B
    `3d^(10)4s^(1)`
    C
    `3d^(9)5s^(2)`
    D
    `3d^(10)5s^(1)`

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