| Formula / Notation | Pm |
|---|---|
| CAS Number | 7440-12-2 |
| Molecular Weight | 145.0 |
| Melting Point | 1042.0 |
| Boiling Point | 3000.0 |
| Density | 7.26 |
| Solubility | Soluble as Pm3+ salts |
| Appearance | Silvery, metallic, radioactive solid |
| Also Known As | Pm, promethium element |
| Category | Elements |
What is Promethium?
Promethium is a radioactive rare earth metal, atomic number 61. The only lanthanide with no stable isotopes. Produced in nuclear reactors. Named after the Greek Titan Prometheus. Pm-147 is the most important isotope (beta emitter).
Formula & Notation
IUPAC Name: Promethium
Other Names / Synonyms: Pm, promethium element
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 1042.0 |
| Boiling Point | 3000.0 |
| Density | 7.26 |
| Molecular Weight | 145.0 |
| Solubility | Soluble as Pm3+ salts |
| Appearance | Silvery, metallic, radioactive solid |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Promethium is a radioactive rare earth metal, atomic number 61. The only lanthanide with no stable isotopes. Produced in nuclear reactors. Named after the Greek Titan Prometheus. Pm-147 is the most important isotope (beta emitter).
Promethium-147 nuclear batteries (pacemakers, spacecraft - historical). Luminescent paint (replaced radium). Thickness gauges and X-ray sources. Promethium-147 as beta source for research.
All isotopes radioactive. Pm-147: beta emitter, requires radiation shielding and handling with remote manipulation. Not found in nature in significant amounts. Requires nuclear material handling procedures and regulatory compliance.
The formula or notation for Promethium is: Pm