Samarium (Sm)
Samarium (Sm) is element 62 of the periodic table, a lanthanide in period 6, in the f-block. Its standard atomic weight is 150.36, so one mole of samarium atoms has a mass of 150.36 g. At room temperature it is a solid; it melts at 1073.85 °C and boils at 1793.85 °C.
| Atomic number | 62 |
|---|---|
| Symbol | Sm |
| Standard atomic weight | 150.36 |
| Molar mass | 150.36 g/mol |
| Category | Lanthanide |
| Group | f-block (lanthanide series) |
| Period | 6 |
| Block | f-block |
| Electron configuration | [Xe] 6s2 4f6 |
| Oxidation states | +3, +2 |
| Electronegativity (Pauling) | 1.17 |
| Atomic radius (van der Waals) | 229 pm |
| First ionisation energy | 5.644 eV (544.6 kJ/mol) |
| Electron affinity | — |
| State at room temperature | Solid |
| Melting point | 1347 K (1073.85 °C) |
| Boiling point | 2067 K (1793.85 °C) |
| Density | 7.52 g/cm³ |
| Discovered | 1879 |
Lanthanides
La · LanthanumCe · CeriumPr · PraseodymiumNd · NeodymiumPm · PromethiumEu · EuropiumGd · GadoliniumTb · TerbiumDy · DysprosiumHo · HolmiumEr · ErbiumTm · ThuliumYb · Ytterbium
Calculate with Samarium
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.