| Name | tantalum |
|---|---|
| Symbol | Ta |
| Atomic Weight | 180.9479 |
| Atomic Number | 73 |
| CAS ID | 7440-25-7 |
| Group Number | 5 |
| Group Name | (none) |
| Period Number | 6 |
| Origin of Name | Greek, Tantalos = father of Niobe. |
| Year Discovered | 1802 |
| Discovery Credits | Discovered by A. G. Eceberg at Uppsala, Sweden. |
| Class | Metallic |
| Color | Gray Blue |
| Standard State | Solid at 77 F & 298 K |
| Description | Shiny, silvery metal, soft when pure. Very corrosion resistant due to oxide film; attacked by HF and fused alkalis. Used in
electronics as tantalum capacitors, cutting tools, chemical plants and surgery. Diagnostic tests: |