The stability of atoms whose subshells are half-filled with electrons is due to equilibrium and symmetry.
The stability of an atom of an element depends on the number of electrons in its valence shell.
Atoms whose valence shells are completely filled are particularly stable atoms.
Similarly, subshells half-filled with electrons are particularly stable.
The stability of subshells half-filled with electrons can be explained based on equilibrium and symmetry.
A half-filled subshell distributes the energy of the electrons evenly and symmetrically such that the atom attians stability.
Therefore, stability of subshells half-filled with electrons is due to equilibrium and symmetry.
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