Technetium
| Tc |
Technetium |
Transition Metal |
| Atomic number: |
43 |
|
Atomic weight: |
(97.9072) |
|
| Shells: |
2,8,18,13,2 |
|
Orbitals: |
[Kr] 4d5 5s2 |
|
| Melting point: |
2172°C |
|
Boiling point: |
4877°C |
|
| Covalent radius: |
1.27 |
Å |
Atomic volume: |
8.5 |
cm³/mol |
| Atomic radius: |
1.95 |
Å |
Ionic radius: |
-- |
Å |
| Electronegativity: |
1.9 |
|
Oxidation states: |
(7),6,4 |
|
| 1st ionization pot.: |
7.28 |
V |
2nd ionization pot.: |
15.26 |
V |
| 3rd ionization pot.: |
29.54 |
V |
Specific heat: |
0.21 |
J/gK |
| Heat of fusion: |
24.0 |
kJ/mol |
Heat of vapor.: |
660.0 |
kJ/mol |
| Thermal conduct.: |
0.506 |
W/cmK |
Electrical conduct.: |
0.067 |
10^6/cm ohm |
| Density: |
11.5 |
g/cm³ |
Valence: |
0,2,4,5,6,7 |
|
