Atomic number 57La
Lanthanum
ল্যান্থানাম
- Lanthanide
- Period 6
- Atomic mass 138.910 u
- Solid
- Electrons per shell
- 2, 8, 18, 18, 9, 2
- Electron configuration
- [Xe] 5d1 6s2
- Nucleus
- 57 protons, 82 neutrons
Speed1×
- Group
- None (f-block)
- Period
- 6
- Block
- f-block
- Category
- Lanthanide
- State at 25 °C
- Solid