Tantalum

Symbol TaAtomic number 73
Atomic mass
180.947
 Thermal conductivity
0.55
Atomic radius
2.09
 Covalent radius
1.34
Density
16.6
 Atomic volume
10.9
Melting point
3270
 Oxidation states
5
Boiling point
5731
 Stable isotopes
1
Heat of vapor.
743
 Electronegativity
1.5
Heat of fusion
31.6
 First ionization
7.89
Specific heat
0.14
 Electrical conduct.
...
Electron configuration

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Tantalum

Tantalum and Niobium commonly occur together in the iron -containing minerals columbite (FeNb2O6) and tantalite (FeTa2O6).

Tantalum carbide, TaC, is a very hard substance which is used for making high-speed cutting tools.

Atomic dataNuclear data
 Index

Periodic Table

Chemistry concepts

Reference
Pauling
 
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Tantalum Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
73
179
178.945930
166.6511
1438.0
7/2
...
1.82y
EC
0.11
73
180
179.947462
167.5840
1444.7
1
...
18.15h
EC,b-
0.87,0.71
73
181
180.947993
168.5160
1452.3
7/2
0.99998
stable
...
...
73
182
181.950148
169.4496
1458.3
3
...
115d
b-
1.81
Atomic data
Index

Periodic Table

Chemistry concepts

Reference
Rohlf
 
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