| Name | technetium |
|---|---|
| Symbol | Tc |
| Atomic Weight | 98 |
| Atomic Number | 43 |
| CAS ID | 7440-26-8 |
| Group Number | 7 |
| Group Name | (none) |
| Period Number | 5 |
| Origin of Name | Greek, Technikos="artificial." |
| Year Discovered | 1937 |
| Discovery Credits | Discovered by C. Perrier and E. G. Segre at Palermo, Italy. |
| Class | Metallic |
| Color | Silvery Gray Metallic |
| Standard State | Solid at 77 F & 298 K |
| Description | Radioactive metal which does not occur naturally. Silvery as the metal but usually obtained as a gray powder. Resists oxidation, slowly tarnishes in moist air, burns in oxygen, dissolves in nitric and sulfuric acids. |