Element 57
Lanthanum (La)
57
La
lanthanum
Metal · d block · group 3, period 6
- Electron configuration
- Unpaired electrons
- 1 (paramagnetic)
- Molar mass
- 138.91 g/mol
- Electronegativity
- 1.1
- Atomic radius
- 187 pm
- First ionization energy
- 538 kJ/mol
- Next ionization energies
- 1,067, 1,850
- Electron affinity
- 45 kJ/mol released
Practice
Practice lanthanum
No course questions are about lanthanum specifically, but these lessons cover what you need.