Rubidium

Rb Rubidium Alkali Metal

 

Atomic number:  37 Atomic weight:  85.4678
Shells:  2,8,18,8,1 Orbitals:  [Kr] 5s1
Melting point:  38.89°C Boiling point:  686°C
Covalent radius:  2.16 Å Atomic volume:  55.9 cm³/mol
Atomic radius:  2.98 Å Ionic radius:  1.61 (+1) Å
Electronegativity:  0.82 Oxidation states:  
1st ionization pot.:  4.1771 V 2nd ionization pot.:  27.28 V
3rd ionization pot.:  40.0 V Specific heat:  0.363 J/gK
Heat of fusion:  2.192 kJ/mol Heat of vapor.:  72.216 kJ/mol
Thermal conduct.:  0.582 W/cmK Electrical conduct.:  0.0779 10^6/cm ohm
Density:  1.53 g/cm³ Valence:  1,2,3,4