Hafnium
| Hf |
Hafnium |
Transition Metal |
| Atomic number: |
72 |
|
Atomic weight: |
178.49 |
|
| Shells: |
2,8,18,32,10,2 |
|
Orbitals: |
[Xe] 4f14 5d2 6s2 |
|
| Melting point: |
2227°C |
|
Boiling point: |
4602°C |
|
| Covalent radius: |
1.44 |
Å |
Atomic volume: |
13.6 |
cm³/mol |
| Atomic radius: |
2.16 |
Å |
Ionic radius: |
.83 (+4) |
Å |
| Electronegativity: |
1.3 |
|
Oxidation states: |
|
|
| 1st ionization pot.: |
6.8251 |
V |
2nd ionization pot.: |
14.925 |
V |
| 3rd ionization pot.: |
23.32 |
V |
Specific heat: |
0.14 |
J/gK |
| Heat of fusion: |
24.060 |
kJ/mol |
Heat of vapor.: |
575.0 |
kJ/mol |
| Thermal conduct.: |
0.230 |
W/cmK |
Electrical conduct.: |
0.0312 |
10^6/cm ohm |
| Density: |
13.2 |
g/cm³ |
Valence: |
4 |
|
