| Name | platinum |
|---|---|
| Symbol | Pt |
| Atomic Weight | 195.078 |
| Atomic Number | 78 |
| CAS ID | 7440-06-4 |
| Group Number | 10 |
| Group Name | Precious Metal |
| Period Number | 6 |
| Origin of Name | Spanish, platina = "silver." |
| Year Discovered | 1750 |
| Discovery Credits | Known to pre-Columbian South Americans and taken to Europe about 1790. |
| Class | Metallic |
| Color | Grayish White |
| Standard State | Solid at 77 F & 298 K |
| Description | Silvery-white metal, lustrous, malleable, ductile.
Unaffected by oxygen and water, only dissolves in aqua-regia and fused
alkalis. Used in jewelry, drugs, catalysts, etc. Diagnostic tests: |