 |
| Name |
rhodium |
| Symbol |
Rh |
| Atomic Weight |
102.90550 |
| Atomic Number |
45 |
| CAS ID |
7440-16-6 |
| Group Number |
9 |
| Group Name |
Precious Metal |
| Period Number |
5 |
| Origin of Name |
Greek, rhodon = "rose" |
| Year Discovered |
1803 |
| Discovery Credits |
W. H. Wollaston at London, UK. |
| Class |
Metallic |
| Color |
Silvery White Metallic |
| Standard State |
Solid at 77 F & 298 K |
| Description |
Rare, lustrous, silvery, hard mental of the platinum group.
Stable in air up to 875 K. Inert to all acids, attacked by fused alkalis.
Used as a catalyst. Diagnostic tests:
There are no simple chemical tests for rhodium. The element is usually
found as an alloy or a sulfide mineral with other platinum group metals. Atomic Absorption
Spectroscopy is used for quantitative analysis and Energy Dispersive
Analysis of X-rays (EDAX) is used for qualitative analysis.
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