65
Tb
Terbium
Lanthanide period 6 f-block discovered: 1843
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 65
- Atomic mass
- 158.92535 a.m.u.
- Electron configuration
- [Xe]6s2 4f9
- Atomic radius
- 221 pm
- Ionization energy
- 5.864 eV
- Oxidation states
- +3
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 1629 K (1 355,85 °C)
- Boiling point
- 3503 K (3 229,85 °C)
- Density
- 8.23 g/cm³