Erbium

Er
Erbium
Rare Earth

 

Atomic number:
 68
Atomic weight:
 167.26
Shells:
 2,8,18,30,8,2
Orbitals:
 [Xe] 4f12 6s2
Melting point:
 1529°C
Boiling point:
 2868°C
Covalent radius:
 1.57
Å
Atomic volume:
 18.4
cm³/mol
Atomic radius:
 2.45
Å
Ionic radius:
 1.00 (+3)
Å
Electronegativity:
 1.24
Oxidation states:
 
1st ionization pot.:
 6.1078
V
2nd ionization pot.:
 11.929
V
3rd ionization pot.:
 22.739
V
Specific heat:
 0.17
J/gK
Heat of fusion:
 19.90
kJ/mol
Heat of vapor.:
 261.0
kJ/mol
Thermal conduct.:
 0.143
W/cmK
Electrical conduct.:
 0.0117
10^6/cm ohm
Density:
 9.05
g/cm³
Valence:
 3