Holmium (Ho)
Holmium (Ho) is element 67 of the periodic table, a lanthanide in period 6, in the f-block. Its standard atomic weight is 164.930329, so one mole of holmium atoms has a mass of 164.930329 g. At room temperature it is a solid; it melts at 1473.85 °C and boils at 2699.85 °C.
| Atomic number | 67 |
|---|---|
| Symbol | Ho |
| Standard atomic weight | 164.930329 |
| Molar mass | 164.930329 g/mol |
| Category | Lanthanide |
| Group | f-block (lanthanide series) |
| Period | 6 |
| Block | f-block |
| Electron configuration | [Xe] 6s2 4f11 |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 1.23 |
| Atomic radius (van der Waals) | 216 pm |
| First ionisation energy | 6.022 eV (581 kJ/mol) |
| Electron affinity | — |
| State at room temperature | Solid |
| Melting point | 1747 K (1473.85 °C) |
| Boiling point | 2973 K (2699.85 °C) |
| Density | 8.8 g/cm³ |
| Discovered | 1878 |
Lanthanides
La · LanthanumCe · CeriumPr · PraseodymiumNd · NeodymiumPm · PromethiumSm · SamariumEu · EuropiumGd · GadoliniumTb · TerbiumDy · DysprosiumEr · ErbiumTm · ThuliumYb · Ytterbium
Calculate with Holmium
Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.