Radium

Ra
Radium
Alkali Earth Metal

 

Atomic number:
 88
Atomic weight:
 (266.0254)
Shells:
 2,8,18,32,18,8,2
Orbitals:
 [Rn 7s2
Melting point:
 700°C
Boiling point:
 1140°C
Covalent radius:
 --
Å
Atomic volume:
 45.20
cm³/mol
Atomic radius:
 --
Å
Ionic radius:
 1.62 (+2)
Å
Electronegativity:
 0.9
Oxidation states:
 
1st ionization pot.:
 5.2789
V
2nd ionization pot.:
 10.148
V
3rd ionization pot.:
 --
V
Specific heat:
 0.12
J/gK
Heat of fusion:
 --
kJ/mol
Heat of vapor.:
 --
kJ/mol
Thermal conduct.:
 0.186
W/cmK
Electrical conduct.:
 --
10^6/cm ohm
Density:
 5
g/cm³
Valence:
 2