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background Key data; description History hydrogen around us Uses Geology Biology hydrogen compounds Reactions of hydrogen Compounds Bond enthalpies Radii in compounds Lattice energies Reduction potentials nuclear properties NMR Naturally occurring isotopes Radioisotopes electronic properties Electronic configuration Ionization energies Electron affinities Electronegativities Effective nuclear charges Electron binding energies Atom radii Valence shell radii physical properties Bulk properties (density, resistivity, etc.) Thermal properties (melting point, etc.) Thermodynamic properties crystallography Crystal structure Elements ARGON 18 Ar 39.948 (1) g r actiniumaluminiumamericiumantimonyargonarsenicastatinebariumberkeliumberylliumbismuthbohriumboronbrominecadmiumcaesiumcalciumcaliforniumcarbonceriumchlorinechromiumcobaltcoppercuriumdarmstadtiumdubniumdysprosiumeinsteiniumerbiumeuropiumfermiumfluorinefranciumgadoliniumgalliumgermaniumgoldhafniumhassiumheliumholmiumhydrogenindiumiodineiridiumironkryptonlanthanumlawrenciumleadlithiumlutetiummagnesiummanganesemeitneriummendeleviummercurymolybdenumneodymiumneonneptuniumnickelniobiumnitrogennobeliumosmiumoxygenpalladiumphosphorusplatinumplutoniumpoloniumpotassiumpraseodymiumpromethiumprotactiniumradiumradonrheniumrhodiumroentgeniumrubidiumrutheniumrutherfordiumsamariumscandiumseaborgiumseleniumsiliconsilversodiumstrontiumsulphurtantalumtechnetiumtelluriumterbiumthalliumthoriumthuliumtintitaniumtungstenuraniumvanadiumxenonytterbiumyttriumzinczirconium Thermal Properties and temperatures Temperatures Melting point [/K]: 83.8 [or -189.3 °C (-308.7 °F)] Boiling point [/K]: 87.3 [or -185.8 °C (-302.4 °F)] (liquid range: 3.5 K) Critical temperature [/K]: 150.8 [or -122.2 °C (-188 °F)] Superconduction temperature [/K]: no data Expansion and conduction properties Thermal conductivity [/W m-1 K-1]: 0.01772 Coefficient of linear thermal expansion [/K-1 multiplied by 106]: no data Enthalpies Enthalpy of fusion [/kJ mol-1]: 1.18 Enthalpy of vaporization [/kJ mol-1]: 6.5 Enthalpy of atomization [/kJ mol-1]: 0 Fluorides none listed Chlorides none listed Bromides none listed Iodides none listed Hydrides none listed Oxides none listed Sulfides none listed Selenides none listed Tellurides none listed Nitrides none listed

Our data and resources are taken from Web Elements