| Name | praseodymium |
|---|---|
| Symbol | Pr |
| Atomic Weight | 140.90765 |
| Atomic Number | 59 |
| CAS ID | 7440-10-0 |
| Group Number | |
| Group Name | Lanthanoid |
| Period Number | 6 |
| Origin of Name | Greek, prasios didymos = "green twin" |
| Year Discovered | 1885 |
| Discovery Credits | Separated by Baron Auer von Welsbach at Vienna, Austria. |
| Class | Metallic |
| Color | Silvery White, Yellowish Tinge |
| Standard State | Solid at 77 F & 298 K |
| Description | Soft, malleable, silvery metal of the lanthanide group.
Reacts slowly with oxygen, rapidly with water. Used in alloys for
permanent magnets, flints, yellow glass for eye protection for welders,
etc. Diagnostic tests: |