| Name | rhenium |
|---|---|
| Symbol | Re |
| Atomic Weight | 186.207 |
| Atomic Number | 75 |
| CAS ID | 7440-15-5 |
| Group Number | 7 |
| Group Name | (none) |
| Period Number | 6 |
| Origin of Name | After the Rhine river. |
| Year Discovered | 1925 |
| Discovery Credits | W. Noddack, Ida Tacke, and O. Berg in Berlin, Germany. |
| Class | Metallic |
| Color | Grayish White |
| Standard State | Solid at 77 F & 298 K |
| Description | Silvery metal, usually obtained as gray powder. Resists
corrosion and oxidation but slowly tarnishes in moist air. Dissolves in
nitric and sulfuric acids. Used in filaments, thermistors, and catalysts. Diagnostic tests: |