Atomic number 88Ra
Radium
রেডিয়াম
- Alkaline earth metal
- Group 2
- Period 7
- Atomic mass [226] u
- Solid
- Electrons per shell
- 2, 8, 18, 32, 18, 8, 2
- Electron configuration
- [Rn] 7s2
- Nucleus
- 88 protons, 138 neutrons
- Valence electrons
- 2
Speed1×
- Group
- 2
- Period
- 7
- Block
- s-block
- Category
- Alkaline earth metal
- State at 25 °C
- Solid