Orbital diagrams are pictorial descriptions of the electrons in an atom and their placement within energy levels.
Topic 1.5: 1.5 Atomic Structure and Electron Configuration
Orbital Diagrams cheat sheet for homework
Quantum Numbers: Set of four numbers used to describe an electron's energy state in an atom.
The principle that states no two electrons in an atom can have identical quantum mechanical states.
The rule that electrons occupy the orbitals of lowest energy first.