Orbitals are regions around the nucleus of an atom where electrons are most likely to be found. They come in different shapes and energy levels.
Orbitals cheat sheet for homework
Sublevels: These are divisions within principal energy levels that contain one or more orbitals. Like different sections within a dog park.
Quantum Numbers: These numbers describe properties of atomic orbitals and their electron occupants; they're like ID tags for dogs at each park.
A principle stating that no two electrons can occupy the same quantum state simultaneously; it's like saying no two dogs can have the same ID tag.