Lanthanum (La)
A fascinating lanthanide element.
Lanthanum is element 57 on the periodic table.
Element properties
- Atomic number
- 57
- Symbol
- La
- Atomic mass
- 138.91 u
- Category
- Lanthanide
- Period
- 6
- Group
- 3
- Block
- f
- State
- Solid
- Electron configuration
- [Xe] 5d1 6s2
- Electronegativity (Pauling)
- 1.1
- Density
- 6.146 g/cm³
- Melting point
- 920 °C
- Boiling point
- 3464 °C