 |
| Name |
promethium |
| Symbol |
Pm |
| Atomic Weight |
145 |
| Atomic Number |
61 |
| CAS ID |
7440-12-2 |
| Group Number |
|
| Group Name |
Lanthanoid |
| Period Number |
6 |
| Origin of Name |
Greek, Prometheus, who stole fire from the gods. |
| Year Discovered |
1945 |
| Discovery Credits |
Produced by J. A. Marinsky, L. E. Glendenin, and C. D.
Coryell at Oak Ridge, Tennessee, USA. |
| Class |
Metallic |
| Color |
Metallic |
| Standard State |
Solid at 77 F & 298 K |
| Description |
Radioactive metal of the lanthanide group. Used in specialized miniature
batteries and radioactive tracers. |
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