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is it possible for atoms with even atomi...

is it possible for atoms with even atomic number to contain unpaired electron?

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Atoms with even atomic number cann have unpaired electrons. This is in accordance with Hund's rule which states that the orbitals within the same subshell are at first filled up singly with electrons having parallel spin, before pairing takes place. For instance, in case of a carbon atom (atomic number 6 and electronic configuration: `1s^(2)2s^(2)2p_(x)^(1)2p_(y)^(1)2p_(z)^(0)`), there are two unpaired electrons.
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Knowledge Check

  • Which molecule or ion out of the following does not contain unpaired electrons ?

    A
    `N_2^+`
    B
    `O_2`
    C
    `O_2^(2-)`
    D
    `B_2`

  • The N orbit of an atom of an element having atomic number 20 contains 2 electrons. The number of electrons in its K, L and M orbits are respectively :

    A
    2, 6, 10
    B
    2, 8, 8
    C
    2, 2, 14
    D
    2, 4, 12

  • Atomic number of Mn, Fe and Co an dNi are 25, 26 27 and 28 respectively. Which of the following outer orbital octahedral complexes have same number of unpaired electrons -

    A
    `[MnCl_(6)]^(3-)`
    B
    `[FeF_(6)]^(3-)`
    C
    `[CoF]^(3-)`
    D
    `[Ni(NH_(3))_(6)]^(2+)`

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