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Argon (properties)

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Argon
Classification: Non-metal, Group: Noble gases, Symbol: Ar, Crystal structure: Cubic, Electron configuration: 1s2 2s2p6 3s2p6
Property Value in metric unit Value in US unit
Atomic radius 0.88 Å 0.88 Å
Covalent radius 0.98 Å 0.98 Å
Energy of first ionization 1521 kJ/mol 363.8 kcal/mol
Energy of second ionization 2666 kJ/mol 637.8 kcal/mol
Energy of third ionization 3931 kJ/mol 940.4 kcal/mol
Electro-negativity (Allrod Rochow) 3.2 3.2
Atomic mass (average) 39.948 39.948
Atomic volume 28.5 cm³/mol 1.739 in³/mol
Density of gas at 68°F (20°C), 1 atm. 1.7824 kg/m³ 0.1113 lb/ft³
Heat of fusion 1.188 kJ/mol 0.2842 kcal/mol
Heat of vaporization 6.447 kJ/mol 1.5423 kcal/mol
Specific heat capacity 520 J/(kg*K) 0.124 BTU/(lb*ºF)
Boiling point -185.9 ºC -302.5 ºF
Melting Point -189.4 ºC -308.8 ºF
Thermal conductivity at 68°F (20°C), 1 atm. 0.02 W/(m*K) 0.14 BTU*in/(hr*ft²*ºF)
Appearance colorless, odorless, tasteless gas

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argon_properties.txt · Last modified: 2023/12/14 by dmitri_kopeliovich
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