Hafnium
Hf
Hafnium
Transition Metal
Atomic number:
72
Atomic weight:
178.49
Shells:
2,8,18,32,10,2
Orbitals:
[Xe] 4f14 5d2 6s2
Melting point:
2227°C
Boiling point:
4602°C
Covalent radius:
1.44
Å
Atomic volume:
13.6
cm³/mol
Atomic radius:
2.16
Å
Ionic radius:
.83 (+4)
Å
Electronegativity:
1.3
Oxidation states:
1st ionization pot.:
6.8251
V
2nd ionization pot.:
14.925
V
3rd ionization pot.:
23.32
V
Specific heat:
0.14
J/gK
Heat of fusion:
24.060
kJ/mol
Heat of vapor.:
575.0
kJ/mol
Thermal conduct.:
0.230
W/cmK
Electrical conduct.:
0.0312
10^6/cm ohm
Density:
13.2
g/cm³
Valence:
4
