| Element (Atom) Name | Promethium |
| Symbol | Pm |
| Physical state at room temperature | Solid |
| Element Classification | Metal |
| Group Name | Lanthanide |
| Period Number (Periodic table) | 6 |
| Group number (Periodic table) | None |
| Atomic number | 61 |
| Atomic weight | 145 (Ref: Jlab-ele061, Lanl-61, Nist-61) |
| Atomic Radius | 236 pm (Van der Waals) (Ref: Lanl-61) |
| Density | 7.26 g/cm3.. (Ref: Jlab-ele061) |
| Melting point | 1042°C (Ref: Jlab-ele061, Lanl-61) |
| Boiling point | 3000°C (Ref: Jlab-ele061, Lanl-61) |
| Electron shell configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f5 5s2 5p6 6s2 |
| Oxidation States | +3 (Ref: Jlab-ele061) 3, 2 (a mildly basic oxide) (Ref: Lanl-61) |
| Ionization Energy | 5.55 eV (Ref: Jlab-ele061) 5.58187 eV (Ref: Nist-61) |
| Number of Stable Isotopes | 0 |
| InChI | InChI=1S/Pm (Ref: Pubchem-61) |
| InChI Key | VQMWBBYLQSCNPO-UHFFFAOYSA-N (Ref: Pubchem-61) |
| Remarks | Radioactive and Artificially Produced (Ref: Jlab-ele061) |
REFERENCES
- Jlab-ele061: https://education.jlab.org/itselemental/ele061.html
- Lanl-61: https://periodic.lanl.gov/61.shtml
- ciaaw: https://www.ciaaw.org/atomic-weights.htm
- Nist-61: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=61
- Pubchem-61: https://pubchem.ncbi.nlm.nih.gov/element/61
- science.co.il: https://www.science.co.il/elements/
