Final answer:
The electron configuration rules help chemists determine the number of outer shell electrons an atom has. The rules include the Aufbau Principle, Hund's Rule, and the Pauli Exclusion Principle.
Step-by-step explanation:
The electron configuration rules help chemists determine the number of outer shell electrons an atom has. The electron configuration notation is used to denote where electrons are located in a specific atom. The rules include the Aufbau Principle, Hund's Rule, and the Pauli Exclusion Principle.
The Aufbau Principle states that electrons fill the lowest energy levels first. Hund's Rule states that electrons occupy orbitals of the same energy level singly before pairing up. The Pauli Exclusion Principle states that no two electrons in an atom can have the same set of quantum numbers.