Characteristics of the element
| Symbol: Fr |
| Name: Francium |
| Latin name: Francium |
| Atomic number: 87 |
| Atomic mass: 223 |
| Melting point: 27 (°C) |
| Boiling point: 677 (°C) |
| Density 1,87 (g/cm 3 ) |
| Electronegativity: 0,86 |
| Oxidation number: I |
| Number of neutrons: 136 |
| Crystal structure: Cubic |
| Chemical serie: Alkali metals |
| Color: ----- |
| Electron configuration: 2-18-18-32-18-8-1 |
| Year of discovery:: 1939 |
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Update: 26.11.25
Update: 26.11.25