71
Lu
Lutetium
Lanthanide period 6 f-block discovered: 1907
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 71
- Atomic mass
- 174.9667 a.m.u.
- Electron configuration
- [Xe]6s2 4f14 5d1
- Electronegativity
- 1.27 on the Pauling scale
- Atomic radius
- 221 pm
- Ionization energy
- 5.426 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
- 1936 K (1 662,85 °C)
- Boiling point
- 3675 K (3 401,85 °C)
- Density
- 9.84 g/cm³