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Hydrogen (properties)

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Hydrogen
Classification: Non-metallic, Symbol: H, Crystal structure: Hexagonal, Electron configuration: 1s1
Property Value in metric unit Value in US unit
Atomic radius 0.79 Å 0.79 Å
Covalent radius 0.32 Å 0.32 Å
Ionic radius 0.012 Å 0.012 Å
Valence electron potential -1200 eV -1200 eV
Energy of first ionization 1312 kJ/mol 313.9 kcal/mol
Electro-chemical equivalent 0.0376 *10-3 kg/A*hr 1.33 *10-3 oz/A*hr
Electro-negativity (Pauling) 2.2 2.2
Atomic mass (average) 1.00794 1.00794
Atomic volume 14.4 cm³/mol 0.08787 in³/mol
Density of gas at 68°F (20°C), 1 atm. 0.08988 kg/m³ 5.6 *10-3 lb/ft³
Heat of fusion 0.05868 kJ/mol 0.01404 kcal/mol
Heat of vaporization 0.44936 kJ/mol 0.1075 kcal/mol
Specific heat capacity 14304 J/(kg*K) 3.411 BTU/(lb*ºF)
Boiling point -252.9 ºC -423.2 ºF
Melting Point -259.1 ºC -434.5 ºF
Thermal conductivity at 68°F (20°C), 1 atm. 0.18 W/(m*K) 1.25 BTU*in/(hr*ft²*ºF)
Appearance colorless, odorless, tasteless gas

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hydrogen_properties.txt · Last modified: 2012/06/03 by dmitri_kopeliovich
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