| A | B |
|---|
| ground state | lowest state of energy for an atom |
| photon | energy given off when electrons return to their groundstate; a particle of light |
| wavelength | distance from two corresponding parts of a wave, such as crest to crest |
| orbital | describes the probable location of an electron around the nucleus of an atom |
| electromagnetic spectrum | all of the waves that travel through empty |
| Heisenberg Uncertainty | states that it is impossible to know exact location of an electron |
| quantum number | There are four of these. They describe the chracteristics |
| photoelectric effect | Emission of electrons from metals when light shines on it |
| electromagnetic radiation | Any form of energ ythat travels thrugh empty space. Light is an example of this |
| excited state | Describes an atom when electronsgo to a higher orbit |
| quantum | A word describing the amount of energy to "excite" an electron to another orbit |
| quantum theory | An explanation that describes the locatin o electrons around a nucleus of an atom |
| frequency | Number of waves per unit of time, measured in hz. |
| continuous spectrum | A complete array of energy, such as the colors that mae up visible light. |
| line-emission spectrum | Specific colors given off by an element as seen through a spectrometer |
| Pauli ExclusionPrincipal | States that no two electrons can have the same four quantum numbers. |
| noble gases | A family of elements that are "inert" |
| principal quantum number | These numbers describe the main energy levels, represented by n. |
| noble-gas configuration | The short form for showing only outer shell electrons |
| Hund's Rule | States that electrons occupy each available orbit befoe they pair up. |
| magnetic quantum number | This quantum umber describes the orientation (location) of the orbital |
| angular momentum quantum number | Thi squantum number describes shape, using a letter |
| Aufbau Principle | States that electrons always occupy lowest energy level available |
| spin quantum number | This quatum number usedto indicate "magnetic fields," usually represented by an arrow |
| electron configuration | Term used to describe arrangement of elecxtrons, using numbers and letter, inthe quantum theory of atoms |
