Hafnium (Hf)
Hafnium
Hafnium (Hf) is a transition metal in period 6, group 4. Its relative atomic mass is 178.49 and the molar mass of the atom is 178.49 g/mol.
Atomic number 72
Atomic mass 178.49
Molar mass 178.49 g/mol
Category Transition metal Solid
Properties of hafnium
| Atomic number | 72 |
|---|---|
| Symbol | Hf |
| Latin name | Hafnium |
| Relative atomic mass | 178.49 |
| Molar mass | 178.49 g/mol |
| Group, period, block | 4, 6, d |
| Category | Transition metal |
| State at 20 °C | Solid |
| Electron configuration | [Xe] 4f¹⁴ 5d² 6s² |
| Electronegativity (Pauling) | 1.3 |
| Atomic radius | 155 pm |
Electron configuration of hafnium
Electrons per shell
K2L8M18N32O10P2
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d² 6s²
Noble-gas notation
72 protons · 72 electrons[Xe] 4f¹⁴ 5d² 6s²
Formula and compounds of hafnium
Simple substanceHfhafniumMolar mass of Hf: 178.49 g/mol
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Frequently asked questions
The relative atomic mass of hafnium is 178.49, so the molar mass of the atom is 178.49 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d² 6s². Noble-gas notation: [Xe] 4f¹⁴ 5d² 6s².