Tantalum
| Ta |
Tantalum |
Transition Metal |
| Atomic number: |
73 |
|
Atomic weight: |
180.9479 |
|
| Shells: |
2,8,18,32,11,2 |
|
Orbitals: |
[Xe] 4f14 5d3 6s2 |
|
| Melting point: |
2996°C |
|
Boiling point: |
5425°C ±100°C |
|
| Covalent radius: |
1.34 |
Å |
Atomic volume: |
10.90 |
cm³/mol |
| Atomic radius: |
2.09 |
Å |
Ionic radius: |
.64 (+5) |
Å |
| Electronegativity: |
1.5 |
|
Oxidation states: |
|
|
| 1st ionization pot.: |
7.89 |
V |
2nd ionization pot.: |
-- |
V |
| 3rd ionization pot.: |
-- |
V |
Specific heat: |
0.14 |
J/gK |
| Heat of fusion: |
31.60 |
kJ/mol |
Heat of vapor.: |
743.0 |
kJ/mol |
| Thermal conduct.: |
0.575 |
W/cmK |
Electrical conduct.: |
0.0761 |
10^6/cm ohm |
| Density: |
16.6 |
g/cm³ |
Valence: |
3,5 |
|
