Francium
| Use attributes for filter ! | |
| Symbol | Fr |
|---|---|
| Electron configuration | [Rn] 7s1 |
| Atomic number | 87 |
| Melting point | 27 °C |
| Atomic mass | 223 u |
| Did you know | Francium is extremely rare; its most stable isotope (half-life about 22 minutes) occurs naturally, to a very limited extent, in uranium minerals. |
| Date of Reg. | |
| Date of Upd. | |
| ID | 776521 |
About Francium
Francium is a chemical element with the symbol Fr and atomic number 87. It used to be known as eka-caesium. It is extremely radioactive; its most stable isotope, francium-223, has a half-life of only 22 minutes.
Francium Photos
