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
