Tantalum (Ta)
Atomic number
73
Mass number
181
Electronegativity
1.5
Covalent radius
1.34
Atomic radius
2.09
Melting point
3287.0
Boiling point
5731.0
Density
16.6
Specific heat
0.14
Electrical conductivity
0.0761e6
Thermal conductivity
0.575