Pm
Promethium
Qaybta 61 · 145.0 u
Promethium waa kaliya radioactive lanthanide aan isotops joogto ah.
Eeg astaamaha
| Atomic mass | 145.0 u |
| Cidhiidhi | 7.26 g/cm³ |
| Natiijooyinka | 1315.0 K |
| Natiijooyinka | 3273.0 K |
| Muuqaalka | Madow |
| Xaaladda heerkulka qolka | Cidhiidhi |
Eegista
| Electronegativity | 1.13 (Pauling) |
| 1st Ionization | 540.0 kJ/mol |
| Istaraatiijiyad | 12.45 kJ/mol |
| Nidaamka | +2, +3 |
_Cusub:
| Nidaamka | [Xe] 4f5 6s2 |
| Awooda | 183.0 pm |
| Xaraf | 199.0 pm |
| Van der Waals | 236.0 pm |
Dib u eegista
| La Ogaaday | Charles D. Coryell, Jacob A. Marinsky, Lawrence E. Glendenin |
| Sannadka la helay | 1945 |
| _Meel | Oak Ridge, Tennessee, Maraykanka |
| Magacaabista | Prometheus, Titan ee sheekooyinka Yuhuudda |
_Warbixinta Promethium
Promethium waa radioactive dhulka yar yar metal ugu horeysay oo laga soo saaray uranium wax soo saarka fission ee 1945. tirada raadraaca ka jira dabiiciga ka uranium burburka. Promethium-147 soo saarta beta rays.
Barnaamijyada
Batteriyadaha Nukliyeerka, daboolka iftiinka, miisaanka dhererka, iyo macluumaadka beta-radiation.
Xaqiiqo xiiso leh
Promethium waxaa loo magacaabay ka dib Prometheus, Titan oo dabka xaday - ku habboon qaybta la helay ee falcelinta nukliyeerka.
Isotoobyo
| Tirada | Tirada | Half-Life | Xasiloon |
| 145 | - | 17.7 years | Ha |
| 147 | - | 2.6234 years | Ha |
Nidaamka
[Xe] 4f5 6s2