| A | B |
|---|
| energy level | fixed energies that electrons can have |
| quantum | the amount of energy required to move an electron |
| quantum mechanical model | mathematically describes probable locations of electrons |
| orbital | region of space with a high probabilitly of finding an electron |
| aufbau principle | electrons occupy lowest energy level orbitals first |
| Pauli exclusion principle | no more than two electrons in same orbitals and they have to have opposite spins |
| Hund's rule | single first then double up |
| amplitude | wave height from base |
| crest | highest part of wave |
| trough | lowest part of wave |
| frequency | number of cycles per second (?) |
| wavelength | the distance between two identical points (?) |
| hertz (Hz) | SI unit for cycles per second |
| speed of light | c= 3.0 X 108 m/s |
| electromagnetic radiation | energy which travels in self propagating waves |
| spectrum | light split into different wavelengths (colors) |
| atomic emission spectrum | elements emit characteristic colors seperated into lines |
| ground state | lowest energy level possible |
| excited state | electrons have jumped up to higher levels |
| photon | packet of light energy (quantum) |
| Heisenberg uncertainty priciple | impossible to know exact velocity and position of electron at same time |
| DeBroglie | wave -particle duality of nature |
