| Fr | Francium | Alkali Metal |
| Atomic number: | 87 | Atomic weight: | (223.0197) | ||
| Shells: | 2,8,18,32,18,8,1 | Orbitals: | [Rn] 7s1 | ||
| Melting point: | 27°C | Boiling point: | 677°C | ||
| Covalent radius: | -- | Å | Atomic volume: | -- | cm³/mol |
| Atomic radius: | -- | Å | Ionic radius: | -- | Å |
| Electronegativity: | 0.7 | Oxidation states: | |||
| 1st ionization pot.: | -- | V | 2nd ionization pot.: | -- | V |
| 3rd ionization pot.: | -- | V | Specific heat: | -- | J/gK |
| Heat of fusion: | -- | kJ/mol | Heat of vapor.: | -- | kJ/mol |
| Thermal conduct.: | 0.15 | W/cmK | Electrical conduct.: | 0.03 | 10^6/cm ohm |
| Density: | -- | g/cm³ | Valence: | 1 |