Lanthanum
La
Lanthanum
Transition Metal
Atomic number:
57
Atomic weight:
138.9055
Shells:
2,8,18,18,9,2
Orbitals:
[Xe] 5d1 6s2
Melting point:
918°C
Boiling point:
3464°C
Covalent radius:
1.69
Å
Atomic volume:
20.73
cm³/mol
Atomic radius:
2.74
Å
Ionic radius:
1.16 (+3)
Å
Electronegativity:
1.10
Oxidation states:
1st ionization pot.:
5.5770
V
2nd ionization pot.:
11.059
V
3rd ionization pot.:
19.174
V
Specific heat:
0.19
J/gK
Heat of fusion:
6.20
kJ/mol
Heat of vapor.:
414.0
kJ/mol
Thermal conduct.:
0.135
W/cmK
Electrical conduct.:
0.0126
10^6/cm ohm
Density:
6.7
g/cm³
Valence:
3
