Atomic number 61Pm
Promethium
প্রমিথিয়াম
- Lanthanide
- Period 6
- Atomic mass [145] u
- Solid
- Electrons per shell
- 2, 8, 18, 23, 8, 2
- Electron configuration
- [Xe] 4f5 6s2
- Nucleus
- 61 protons, 84 neutrons
Speed1×
- Group
- None (f-block)
- Period
- 6
- Block
- f-block
- Category
- Lanthanide
- State at 25 °C
- Solid