Hafnium
Atomic number
72
Atomic weight
178.49
Discovery (year)
1923
Atomic radius (A)
1.6
Melting point (
o
C)
@
Boiling point (
o
C)
@
Density (g/cm
3
)
13.3
Specific heat (cal/g
o
C)
0.035
Ionization potential (eV)
7
Electron Affinity (eV)
0
