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 |
|
