72 Hf
Transition metal
Hafnium
Used in nuclear control rods.
Properties of Hafnium
- Atomic number (Z)
- 72
- Symbol
- Hf
- Atomic mass
- 178.49 g/mol
- Category
- Transition metal
- Group
- 4
- Period
- 6
- Electron configuration
- [Xe] 4f¹⁴ 5d² 6s²
- Electronegativity (Pauling)
- 1.3
- Atomic radius
- 208 pm
- First ionization energy
- 659 kJ/mol
- Melting point
- 2506 K (2232.8 °C)
- Boiling point
- 4876 K (4602.9 °C)
- Density
- 13.31 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1923
Frequently asked questions
What is Hafnium?
Hafnium (Hf) is a transition metal, element number 72 on the periodic table. Used in nuclear control rods.
What is the atomic number and atomic mass of Hafnium?
Hafnium has atomic number 72 and an atomic mass of about 178.49 g/mol.
What is the electron configuration of Hafnium?
The electron configuration of Hafnium is [Xe] 4f¹⁴ 5d² 6s².
Where is Hafnium on the periodic table?
Hafnium sits in group 4, period 6, and is classified as a transition metal.