Atomic number 87Fr
Francium
ফ্রান্সিয়াম
- Alkali metal
- Group 1
- Period 7
- Atomic mass [223] u
- Solid
- Electrons per shell
- 2, 8, 18, 32, 18, 8, 1
- Electron configuration
- [Rn] 7s1
- Nucleus
- 87 protons, 136 neutrons
- Valence electrons
- 1
Speed1×
- Group
- 1
- Period
- 7
- Block
- s-block
- Category
- Alkali metal
- State at 25 °C
- Solid