Answer:
Pauli Exclusion Principle
Explanation:
The Pauli Exclusion Principle expresses that, in a particle or atom, no two electrons can have a similar four electronic quantum numbers. As an orbital can contain a limit of just two electrons, the two electrons must have restricting spin.
It clarifies a wide assortment of physical phenomenon.
It expand electron shell structure of iotas and the manner in which particles share electrons.
Answer:
Hund's rule
Explanation:
Hund's rule states that the lowest-energy configuration for an atom with electrons within a set of degenerate orbitals has the maximum number of unpaired electrons that have parallel spin.
Before any orbital is doubly occupied, every orbital in a sublevel is filled singularly. Both electrons have had the same spin in independently occupied orbitals (to optimize overall spin)
