 |
| Name |
francium |
| Symbol |
Fr |
| Atomic Weight |
223.02 |
| Atomic Number |
87 |
| CAS ID |
7440-73-5 |
| Group Number |
1 |
| Group Name |
Alkali metal |
| Period Number |
7 |
| Origin of Name |
Named after France |
| Year Discovered |
1939 |
| Discovery Credits |
Discovered by Marguerite Perey in Paris, France. |
| Class |
Metallic |
| Color |
Metallic |
| Standard State |
Solid at 77 F & 298 K |
| Description |
Intensely radioactive, short lived metal element.
Primarily occurs as a trace amount (a few ppm) in uranium or thorium minerals where it is a decay
product of uranium and/or thorium. |
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