Barium

Ba Barium Alkali Earth Metal

 

Atomic number:  56 Atomic weight:  137.327
Shells:  2,8,18,18,8,2 Orbitals:  [Xe] 6s2
Melting point:  725°C Boiling point:  1897°C
Covalent radius:  1.98 Å Atomic volume:  39.24 cm³/mol
Atomic radius:  2.78 Å Ionic radius:  1.42 (+2) Å
Electronegativity:  0.89 Oxidation states:  
1st ionization pot.:  5.2117 V 2nd ionization pot.:  10.004 V
3rd ionization pot.:  -- V Specific heat:  0.204 J/gK
Heat of fusion:  7.750 kJ/mol Heat of vapor.:  142.0 kJ/mol
Thermal conduct.:  0.184 W/cmK Electrical conduct.:  0.030 10^6/cm ohm
Density:  3.51 g/cm³ Valence:  2