72
178.49 u
Hf
Hafnium
Transition Metal
Atomic Structure
Physical State
Group
4
Period
6
Block
d
Electron Configuration
[Xe] 4f¹⁴ 5d² 6s²
Physical Properties
Atomic Mass:
178.49 u
Electronegativity:
1.3
Atomic Radius:
208 pm
Ionization Energy:
6.825 eV
Density:
13.31 g/cm³
Melting Point:
2506 K
Boiling Point:
4876 K
Historical Information
Discovered By:
Dirk Coster
Year Discovered:
1923