Argon

Ar Argon Noble Gas

 

Atomic number:  18 Atomic weight:  39.948
Shells:  2,8,8 Orbitals:  [Ne] 3s2 3p6
Melting point:  -189.2°C Boiling point:  -185.7°C
Covalent radius:  0.98 Å Atomic volume:  23.9 cm³/mol
Atomic radius:  0.88 Å Ionic radius:  -- Å
Electronegativity:  0 Oxidation states:  
1st ionization pot.:  15.7596 V 2nd ionization pot.:  27.629 V
3rd ionization pot.:  40.74 V Specific heat:  0.520 J/gK
Heat of fusion:  1.188 kJ/mol Heat of vapor.:  6.447 kJ/mol
Thermal conduct.:  0.0001772 W/cmK Electrical conduct.:  -- 10^6/cm ohm
Density:  0.0017824 g/cm³ Valence:  0