| Name | polonium |
|---|---|
| Symbol | Po |
| Atomic Weight | 208.98 |
| Atomic Number | 84 |
| CAS ID | 7440-08-6 |
| Group Number | 16 |
| Group Name | Chalcogen |
| Period Number | 6 |
| Origin of Name | After the country "Poland." |
| Year Discovered | 1898 |
| Discovery Credits | Marie Curie at Paris, France. |
| Class | Metallic |
| Color | Silvery |
| Standard State | Solid at 77 F & 298 K |
| Description | Radioactive silvery-gray metal. Soluble in dilute acids. Used as heat source in space equipment and as source of alpha radiation for research. Occurs in trace amounts in uranium ores. |