 |
| 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. |
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