Symbol
Hf
Atomic Number
72
Atomic Mass
178.49
Protons
72
Neutrons
106
Electrons
72
Type
Transition Metal
Isotopes
Hafnium-174, Hafnium-176, Hafnium-177, Hafnium-178, Hafnium-179, Hafnium-180
Discovery Year
1923
Discovered By
Zirconium Oganessian
Group
4
Period
6
Boiling Point
4602°C
Melting Point
2150°C
Electron Configuration
[Xe] 6s² 4f¹⁴ 5d²
Density (g/cm³)
13.31
Crystal Structure
Hexagonal
Magnetism
Paramagnetic
Abundance in Earth's Crust
0.0004%
Phase at Room Temperature
Solid