The electronic configuration,which obeys Hund | vedclass

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(A) The atomic number of carbon $(C)$ is $6$. Its electronic configuration is $1s^2 2s^2 2p^2$.According to Hund's rule of maximum multiplicity,pairin

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(A) The atomic number of carbon $(C)$ is $6$. Its electronic configuration is $1s^2 2s^2 2p^2$.According to Hund's rule of maximum multiplicity,pairing of electrons in the orbitals belonging to the same subshell does not take place until each orbital belonging to that subshell has got one electron each (i.e.,it is singly occupied).For the $2p$ subshell of carbon,there are $2$ electrons. According to Hund's rule,these $2$ electrons will occupy separate $2p$ orbitals with parallel spins to minimize inter-electronic repulsion.Looking at the options:Option $(A)$ shows $2p$ orbitals with $2$ electrons in separate orbitals.Option $(B)$ shows $2p$ orbitals with $2$ electrons in separate orbitals,but the spins are opposite (not parallel).Option $(C)$ shows $2p$ orbitals with $2$ electrons paired in a single orbital.Option $(D)$ shows $2s$ orbital with only $1$ electron,which is incorrect for the ground state.Therefore,the correct configuration is represented by option $(A)$.

The electronic configuration,which obeys Hund's rule for the ground state of carbon atom is

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