 |
| 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:
There are no simple chemical tests for rhenium. The element is usually
found as an alloy or a sulfide mineral with other platinum group metals. Atomic Absorption
Spectroscopy is used for quantitative analysis and Energy Dispersive
Analysis of X-rays (EDAX) is used for qualitative analysis.
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