Tantalum
Symbol
Ta
Atomic Number
73
Atomic Weight
180.9479
Element Classification
Discovered By
Anders Ekeberg
Discovery Date
1802 (Sweden)
Name Origin
King Tantalus of Greek mythology, father of Niobe.
Density(g/cc)
16.654
Melting Point
3269
Boiling Point(K)
5698
Appearance
Gray, heavy, hard metal
Atomic Radius(pm)
149
Atomic Volume(cc/mol)
10.9
Covalent Radius(pm)
134
Ionic Radius
68 (+5e)
Specific Heat
0.140
Fusion Heat
24.7
Evaporation Heat(kj/mol)
758
Thermal Conductivity(@25°C W/m K)
57.5
Debye Temperature
225.00
Pauling Negativity Number
1.5
First Ionizing Energy(kj/mol)
760.1
Oxidation States
5
Electronic Configuration
[Xe] 4f14 5d3 6s2
Lattice Structure
Body-Centered Cubic(BCC)
Lattice Constant
3.310
Lattice C/A Ratio
n/a
