Atomic number 55Cs
Caesium
সিজিয়াম
- Alkali metal
- Group 1
- Period 6
- Atomic mass 132.910 u
- Solid
- Electrons per shell
- 2, 8, 18, 18, 8, 1
- Electron configuration
- [Xe] 6s1
- Nucleus
- 55 protons, 78 neutrons
- Valence electrons
- 1
Speed1×
- Group
- 1
- Period
- 6
- Block
- s-block
- Category
- Alkali metal
- State at 25 °C
- Solid