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Which of the following electronic config...

Which of the following electronic configuration is not possible according to Hund's rule?

A

`1s^(2)2s^(2)`

B

`1s^(2)2s^(1)`

C

`1s^(2)2s^(2)2p_(x)^(1)2p_(y)^(1)2p_(z)^(1)`

D

`1s^(2)2s^(2)2p_(x)^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
Configuration `1s^(2)2s^(2)2p_(x)^(2)` is not possible according to Hund's rule because the pairing of electrons in the orbitals belonging to the same subshell `(p, d`, or `f`) does not take place unital each orbital belonging to that subshell has got one electron each, `i.e., it is singly occupied.
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Knowledge Check

  • Which of the following electronic configurations is not possible

    A
    `1s^2 2s^2`
    B
    `1s^2 2s^2 2p^6`
    C
    `3d^10 4s^2 4p^2`
    D
    `1s^2 2s^2 2p^2 3s^1`

  • Which electronic configuration is not observing the (n + l) rule.

    A
    `1s^2, 2 s^2, 2p^6, 3 s^2, 3p^6, 3 d^1, 4 s^2`
    B
    `1 s^2, 2 s^2 2p^6, 3 s^2 3 p^6 3 d^7, 4 s^2`
    C
    `1 s^2, 2 s^2 2 p^6, 3 s^2 3p^6 3 d^5, 4 s^1`
    D
    `1 s, 2 s^2 2 p^6, 3 s^2 3p^6 3 d^8, 4 s^2`

  • which of the following electrons configuraation violate Hund's rule for a p^(4) syatem of an isolated gaseous species ?

    A
    B
    C
    D

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