Lanthanum

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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
SrYZr
Ba ← La → Ce
RaAcTh
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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