When filling degenerate orbitals,electrons fill them singly at first,with parallel spins.This is know as
A)Aufbau principle.
B)Heisenberg uncertainty principle.
C)Hund's rule.
D)Pauli exclusion principle.

Question

Quizplus · Accepted Answer

This is known as Hund's rule which states that when filling degenerate orbitals, electrons will fill them singly with parallel spins before they pair up. This results in the maximum spin alignment, which minimizes the energy of the system. The Aufbau principle states that electrons will fill the lowest energy orbitals first, the Heisenberg uncertainty principle is a fundamental principle of quantum mechanics, and the Pauli exclusion principle states that no two electrons in an atom can have the same set of quantum numbers.

When Filling Degenerate Orbitals,electrons Fill Them Singly at First,with Parallel