Lanthanum
| Lanthanum | |
|---|---|
| La | |
| In situ availability: | |
| Necessity: | |
| Atomic number: | 57 |
| Atomic mass: | 138.9055 |
| group: | 19 |
| period: | N/A |
| normal phase: | Solid |
| series: | Lanthanide |
| density: | 6.162 g/cm3 |
| melting point: | 1193K, 920°C, 1688°F |
| boiling point: | 3737K, 3464°C, 6267°F |
| Sr ← Y → Zr | |
| Ba ← La → Ce | |
| Ra ← Ac → Th | |
| Atomic radius (pm): | 195 |
| Bohr radius (pm): | |
| Covalent radius (pm): | 169 |
| Van der Waals radius (pm): | |
| ionic radius (pm): | (+3) 116 |
| 1st ion potential (eV): | 5.77 |
| Electron Configuration | |
| 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 5d1 6s2 | |
| Electrons Per Shell | |
| 2, 8, 18, 18, 9, 2 | |
| Electronegativity: | 1.1 |
| Electron Affinity: | 0.5 |
| Oxidation states: | 3 |
| Magnetism: | ? |
| Crystal structure: | Hexagonal |
Lanthanum is a Lanthanide metal.
It has a Hexagonal crystalline structure.
This element has a stable isotope of 139
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