Chem Unit 3 Quiz

magnetic quantum number

indicates the orientation of an orbital in a sublevel

principle quantum numbers

symbolized by n, indicates the main ENERGY LEVEL and SIZE of the electron

angular momentum quantum number

indicates the shape of the orbital (s,p,d,f)

spin quantum number

describes the direction an electron spins

Aufbau Rule

Electrons enter orbitals of lowest energy first

Pauli Exclusion Principle

no two electrons in the same atom can have the same set of four quantum numbers

Hund's Rule

electrons go into equal energy orbital by parallel first spin

valence electrons

Electrons that contain the highest energy level of an atom

electron cloud

a region around the nucleus of an atom where electrons are likely to be found, 95% probability

quantum numbers

current theory used to describe atomic structure and electrons