73 · Ta
Tantalum
Described by Ekeberg in 1802.
Identity
- Atomic number
- 73
- Symbol
- Ta
- Canonical name
- Tantalum
- Category
- transition metal
- Group
- 5
- Period
- 6
- Block
- d
Properties
These quantities come from the Periodic Table JSON compilation. They have not yet been checked, one by one, against CIAAW atomic weights or NIST measurements. A value marked estimated is not a measurement.
- Atomic mass
- 180.947882 u
- Electron configuration
- [Xe] 4f14 5d3 6s2
- Electrons per shell
- 2, 8, 18, 32, 11, 2
- Standard state
- solid
- Density
- 16.69 g/cm³
- Melting point
- 3,290 K
- Boiling point
- 5,731 K
- Electronegativity
- 1.5 Pauling
- First ionization energy
- 761 kJ/mol
- Electron affinity
- 31 kJ/mol
History
Tantalum
Discovery · confirmed · 1802
Ekeberg describes tantalum. Distinguishing it from niobium still required Marignac’s work.
Etymology
- Theme
- mythology
- Language
- grec
- Root
- Tantalos
- Meaning
- Tantalus
Scientists
Places and institutions
- Uppsala — historical setting : Sweden — present country : Sweden
See also
Sources
- IUPAC, Periodic Table of the Elements
- Bowserinator, Periodic Table JSON. Compilation secondaire d’où viennent les grandeurs physiques importées (masse, densité, températures, énergies). Elles ne sont pas revérifiées une à une auprès du NIST ou de la CIAAW.
- John Emsley, Nature’s Building Blocks: An A–Z Guide to the Elements