| A | B |
| Abbreviation for the principal quantum number (gives shell size) | n |
| Electrons in the highest ground state energy level are called -----electrons. | Valence |
| s, p, d, and f are examples of these. | Shapes or Sublevels |
| Quantum number associated with the shape of an orbital | Angular Momentum Quantum Number [l] |
| In German Means "Building Up", electrons fill in lowest available energy level obrital, in sequence of "building up" | Aufbau principle |
| arrangement of electrons in a particular atom into specific orbitals | Electron Configuration |
| Orbitals in the same sublevel are all singly filled, before any are doubled, and when singly filled all have the same spin (all spin up or spin down) | Hund’s Rule |
| Quantum # that indicates orientation in space of an orbital relative to the nucleus (compared to X, Y, & Z axis) | Magnetic Quantum Number (m sub l) |
| Group 18 on the periodic table, the last column, has a full valence shell | Noble Gas Group |
| A shorthand method of expressing electron configuration notation using the elemental symbol of the preceding noble gas in brackets (e.g. [Ne]) and then only expressing the electrons higher in energy level in the standard electron configuration notation | Noble Gas Configuration |
| A 3-D shape that represents a solution to the Schrodinger Wave equation and indicates a region of space in which there is a high liklihood of finding an electron with a given set of 4 quantum numbers | Orbital |
| The concept that states no 2 electrons in atom can have all four quantum numbers be the same (i.e. for any electron there is a unique combination of the 4 quantum numbers that define it) | Pauli Exclusion Principal |
| A set of 4 numbers that represent solutions to Schrodingers wave function, that give information regarding electrons in an atom (analgous to an electrons zip code) | Quantum Numbers |
| The theory that describes an atom using applications of matter waves and the complex mathematics required to define them | Quantum Theory |
| Can be losely thought of as the direction of an electrons spin (CW or CCW), the fourth and final quantum number that has two values + and - 1/2 | Magentic Spin Quantum Number (m sub s) |