#73
Tantalum
transition metal· Solid·180.947882 u
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.
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Identity
- Symbol
- Ta
- Atomic Number
- 73
- Atomic Mass
- 180.947882 u
- Category
- transition metal
- Block
- d-block
- Period
- 6
- Group
- 5
- Appearance
- gray blue
- Year Discovered
- 1802 CE
- Discovered By
- Anders Gustaf Ekeberg
- Named By
- Tantalus
Electrons
- Configuration
- [Xe] 4f14 5d3 6s2
- Full Configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d3
- Shells
- 2, 8, 18, 32, 11, 2
- Electronegativity
- 1.5
- Electron Affinity
- 31
- Oxidation States
- +5
- Ionization Energies
- 761, 1500
Physical Properties
- State at
- Solid
- Melting Point
- 3290
- Boiling Point
- 5731
- Density
- 16.69
- Molar Heat
- 25.36 J/(mol·K)
- Crystal Structure
- BCC
- Magnetic Ordering
- Paramagnetic
Mechanical
- Covalent Radius
- 170 pm
- Van der Waals
- 217 pm
- Metallic Radius
- 146 pm
- Mohs Hardness
- 6.5
- Brinell Hardness
- 800 MPa MPa
- Vickers Hardness
- 873 MPa MPa
- Bulk Modulus
- 200 GPa GPa
- Shear Modulus
- 69 GPa GPa
- Young's Modulus
- 186 GPa GPa
Thermal & Electrical
- Thermal Conductivity
- 57.5 W/(m K) W/(m·K)
- Electrical Conductivity
- 7.61 MS/m S/m
- Specific Heat
- 140 J/(kg K) J/(g·K)
- Heat of Vaporization
- 737 kJ/mol kJ/mol
- Heat of Fusion
- 36 kJ/mol kJ/mol
Abundance
- Universe
- 80.0 ppt
- Sun
- 1 ppb
- Meteorite
- 14.0 ppb
- Earth's Crust
- 16.65 ppm
- Ocean
- 2.00 ppt
- Human Body
- 0