Following orbital diagram shows the electronic configuration of nitrogen atom. Which rule does not support this ?

Explanation

1) This electron configuration does not support Hund's rule.
2) According to Hund's rule, the orbitals of equal energy are occupied with one electron each before pairing of electrons starts.
3) Here, pairing of electrons in `2p_(x)` orbital was taken place without filling of an electron in `2p_(z)` orbital.
Hence the correct electron configuration is as follows.