francium — Fr
The chemical element francium is an element of type Alkali metal with the symbol Fr. It has an atomic mass of 223 u and an electronic configuration of [Rn] 7s1.
Synthétique
Radioactif
Liquide
Gaz
677°
8
18
32
18
8
1
- Atomic number
- 87
- Atomic mass
- 223
- Symbol
- Fr
- Melting point
- 26.85
- Boiling point
- 677
- Density
- 1.87
- Period
- 7
- Group
- 1
- Discovery
- 1939 Perey
- Abundance
- 0.001
- Radius
- 0
- Electronegativity
- 0.7
- Ionization
- 4.0727
- Isotope
- 21
- Electronic configuration
- [Rn] 7s1
- Oxidation state
- 1
- Electron
- 2,8,18,32,18,8,1