Promethium
| Atomic number: |
61 |
|
Atomic weight: |
(144.9127) |
|
| Shells: |
2,8,18,23,8,2 |
|
Orbitals: |
[Xe] 4f5 6s2 |
|
| Melting point: |
1042°C |
|
Boiling point: |
3000°C (estimated) |
|
| Covalent radius: |
1.63 |
Å |
Atomic volume: |
22.39 |
cm³/mol |
| Atomic radius: |
2.62 |
Å |
Ionic radius: |
1.09 (+3) |
Å |
| Electronegativity: |
1.13 |
|
Oxidation states: |
|
|
| 1st ionization pot.: |
5.55 |
V |
2nd ionization pot.: |
10.903 |
V |
| 3rd ionization pot.: |
22.283 |
V |
Specific heat: |
0.18 |
J/gK |
| Heat of fusion: |
-- |
kJ/mol |
Heat of vapor.: |
-- |
kJ/mol |
| Thermal conduct.: |
0.179 |
W/cmK |
Electrical conduct.: |
-- |
10^6/cm ohm |
| Density: |
6.475 |
g/cm³ |
Valence: |
3 |
|
