18 Argon Ar  information about the ground-state, ionization energy, and atomic weight data
Atomic Weight:39.948(1)
Ionization Energy:  eV
Ground-state Level:
Ground-state Configuration:

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Atomic Spectroscopic Data information on Atomic Spectroscopic Data
 Atomic Spectra Database-Lines Atomic Spectra Database-Levels Ground States and Ionization Energies Handbook of Basic Atomic Spectroscopic Data X-Ray Transition Energies Database Spectrum of Th-Ar Hollow Cathode Lamps
Bibliographic Databases on Atomic Spectroscopy information on Bibliographic Databases on Atomic Spectroscopy
 Atomic Transition Probability Bibliographic Database Atomic Spectral Line Broadening Bibliographic Database Atomic Energy Levels and Spectra Bibliographic Database
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 X-Ray Attenuation and Absorption Photon Cross Sections X-Ray Form Factor, Attenuation, and Scattering
Radiation Dosimetry Data information on Radiation Dosimetry Data
 Stopping Power and Ranges for Electrons Stopping Power and Ranges for Helium Ions Stopping Power and Ranges for Protons
Nuclear Physics Data information on Nuclear Physics Data
 Atomic Weights and Isotopic Compositions
Condensed Matter Physics Data information on Condensed Matter Physics Data
 Atom Ref Data for Electronic Structure Calcs

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