The statement that "the lowest-energy configuration for an atom is the one having the maximum number of unpaired electrons allowed by the Pauli principle in a particular set of degenerate orbitals" is known as
A)the aufbau principle.
B)Hund's rule.
C)the Pauli exclusion principle.
D)Heisenberg uncertainty principle.
E)the quantum model.

Question

Quizplus · Accepted Answer

The statement given in the question is known as Hund's rule, which states that for a set of degenerate orbitals, the lowest-energy configuration for an atom is the one having the maximum number of unpaired electrons allowed by the Pauli principle. The aufbau principle refers to the order in which sublevels are filled with electrons, while the Pauli exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers. The Heisenberg uncertainty principle and the quantum model are both concepts in quantum mechanics but are not directly related to the statement given in the question.

The Statement That "The Lowest-Energy Configuration for an Atom Is