73Solid
Ta 180.948 Atomic mass · uTransition metals
Tantalum
Tantalum is a chemical element with symbol Ta and atomic number 73. Previously known as tantalium, its name comes from Tantalus, an antihero from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant.
Discovery 1802 (Anders Gustaf Ekeberg)
K2L8M18N32O11P2
Physical properties
Values for the element in its standard state.
- Density
- 16.65g/cm³
- Melting point
- 3,290K
- Boiling point
- 5,731K
- Atomic radius
- 138pm
- Bonding type
- Metallic
- Molar heat
- 25.36J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 10 electrons; 5s, 2 electrons; 5p, 6 electrons; 4f, 14 electrons; 5d, 3 electrons; 6s, 2 electrons;
[Xe] represents 54 core electrons. The full view shows them explicitly.
73 electrons Orbital order preserved from source
- Electronegativity
- 1.5Pauling scale
- First ionization energy
- 761kJ/mol
- Electron affinity
- 31kJ/mol
- Van der Waals radius
- Not available
Ta TantalumAtomic number 73
761kJ/mol
Atomic numberGaps indicate unavailable data
About tantalum
- Appearance
- Gray blue
- Discovery
- 1802 (Anders Gustaf Ekeberg)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.