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
