Text: Energies in Electron Volts Room temperature thermal energy of a molecule..................................0.04 eV Visible light photons....................................................................................1.5-3.5 eV Energy for the dissociation of an NaCl molecule into Na+ and Cl- ions:.........................4.2 eV Ionization energy of atomic hydrogen ............................................13.6 eV Approximate energy of an electron striking a color television screen..................20,000 eV High energy diagnostic medical x-ray photons...............................200,000 eV (=0.2 MeV) Typical energies from nuclear decay: (1) gamma......................................0-3 MeV (2) beta.......................................................................................................0-3 MeV (3) alpha....................................................................................................2-10 MeV Cosmic ray energies ........................................................................1 MeV - 1000 TeV

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