73
Ta
Tantalum
Transition metal period 6 group 5 d-block discovered: 1802
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 73
- Atomic mass
- 180.9479 a.m.u.
- Electron configuration
- [Xe]6s2 4f14 5d3
- Electronegativity
- 1.5 on the Pauling scale
- Atomic radius
- 217 pm
- Ionization energy
- 7.89 eV
- Electron affinity
- 0.322 eV
- Oxidation states
- +5
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 3290 K (3 016,85 °C)
- Boiling point
- 5731 K (5 457,85 °C)
- Density
- 16.4 g/cm³