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 |