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# phyx eqns Atomic

Question | Answer |
---|---|

Energy (three sort of) | E = hf or E = Pc or E= nhf h = planck's constant n = number of atoms f= frequency |

Input energy of a Photon for the photoelectric effect | hf = KE + φ φ= work function (energy needed to get the electron out of the metal) |

Wavelength | λ = h/p or λ = h/mv p= momentum |

Einstein's Energy | E= mc^2 |

Kinetic Energy with T | KE = 3/2 kT |

Ionization Energy of Hydrogen | E = 13.6 eV |

Energy of an electron on the nth level in an hydrogen atom | E1 = -13.6 eV/ n^2 |

Ionization Energy of any Atom | E = 13.6 eV Z^2 Z= Number of protons n= energy level |

Energy of an electron on the nth level in any atom | E = 13.6 eV Z^2 / n^2 |

Force on the electron from a Magnetic Field | F = qvB q= charge |

Energy with Wavelength | E = hc / λ |

Angular Momentum | L = mvr = nh/ 2π n = 1, 2, 3,... r= radius of the nth possible orbit |

Speed of a photon | c=fλ |