Holmium (Ho)
Holmium
Holmium (Ho) is a lanthanide in period 6. Its relative atomic mass is 164.93 and the molar mass of the atom is 164.93 g/mol.
Atomic number 67
Atomic mass 164.93
Molar mass 164.93 g/mol
Category Lanthanide Solid
Properties of holmium
| Atomic number | 67 |
|---|---|
| Symbol | Ho |
| Latin name | Holmium |
| Relative atomic mass | 164.93 |
| Molar mass | 164.93 g/mol |
| Group, period, block | —, 6, f |
| Category | Lanthanide |
| State at 20 °C | Solid |
| Electron configuration | [Xe] 4f¹¹ 6s² |
| Electronegativity (Pauling) | 1.23 |
| Atomic radius | 175 pm |
Electron configuration of holmium
Electrons per shell
K2L8M18N29O8P2
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹¹ 5s² 5p⁶ 6s²
Noble-gas notation
67 protons · 67 electrons[Xe] 4f¹¹ 6s²
Formula and compounds of holmium
Simple substanceHoholmiumMolar mass of Ho: 164.93 g/mol
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Frequently asked questions
The relative atomic mass of holmium is 164.93, so the molar mass of the atom is 164.93 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹¹ 5s² 5p⁶ 6s². Noble-gas notation: [Xe] 4f¹¹ 6s².