Question

Why are electronic spins parallel?

Answer 1

Electron spin is a type of angular momentum as well as a quantum feature of electrons. In addition, the magnitude of this angular momentum is unchanging. In addition, much like charge and rest mass, electron spin is a basic characteristic. Furthermore, the intrinsic angular momentum of each particle is parametrized by spin quantum numbers in atomic physics. The spin quantum number is also the fourth number, with the magnetic quantum number, primary quantum number, and azimuthal quantum number being the other three.

Complete answer:
The electron spin is one of three intrinsic characteristics of electrons, the other two being mass and charge. The spinning of an electron around its axis is referred to as electron spin. In contrast to the classical theory, which depicts the electron as a simple sphere, the electron spin theory depicts it as a quantum particle. According to the hypothesis, the electron spin direction has an impact on some properties of the atom, such as its magnetic properties. In contrast to the classical theory, which depicts the electron as a simple sphere, the electron spin theory depicts it as a quantum particle. In addition, the theory provides information on the direction of electron spin.
With respect to electron spins, parallel spin might be a manifestation of Hund's law of maximum multiplicity. It's important to note that we're dealing with atomic, not molecule, species.
Atomic N has a valence configuration of $2{{s}^{2}}2{{p}^{3}}$ , in which the 2p orbitals are each singly occupied and all electrons are spin-aligned; atomic O has a valence configuration of $2{{s}^{2}}2{{p}^{4}}$ . The ${{O}^{+}}$ species possesses an energetically favourable electron spin state; when the N atom is ionised, the spin state must be changed from its most stable position. Because it has a higher nuclear charge, atomic oxygen should hold its valence electrons more firmly, other things being equal (in the absence of Hund's rule).

Note:
The electron may spin in two directions: clockwise and counterclockwise.
Upwards and downwards
The spinning in the +z and –z directions correspond to the spin up and spin down directions. These spins refer to particles with a spin of 1/2, such as electrons.
The electron is modelled after a minute magnetic bar in quantum theory, with its spin pointing to the minute bar's north pole. The magnetic field generated by two nearby electrons with identical spin directions reinforces each other, resulting in a strong magnetic field. If the spin directions of the proximate electrons are opposite, the magnetic field generated by them cancels out, and no magnetic field exists.