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