Pa
Protactinium
Qaybta 91 · 231.03588 u
Protactinium waa mid ka mid ah kuwa ugu yar iyo ugu qaalisan ee dabiiciga ah ee ka dhaca.
Eeg astaamaha
| Atomic mass | 231.03588 u |
| Cidhiidhi | 15.37 g/cm³ |
| Natiijooyinka | 1841.0 K |
| Natiijooyinka | 4300.0 K |
| Muuqaalka | Silvery metallic, iftiinka iftiinka ah |
| Xaaladda heerkulka qolka | Cidhiidhi |
Eegista
| Electronegativity | 1.5 (Pauling) |
| 1st Ionization | 568.0 kJ/mol |
| Istaraatiijiyad | 53.03 kJ/mol |
| Nidaamka | +3, +4, +5 |
_Cusub:
| Nidaamka | [Rn] 5f2 6d1 7s2 |
| Awooda | 163.0 pm |
| Van der Waals | 243.0 pm |
Dib u eegista
| La Ogaaday | Kasimir Fajans, Oswald Helmuth Gohring |
| Sannadka la helay | 1913 |
| _Meel | Karlsruhe, Jarmalka |
| Magacaabista | Greek 'protos' iyo 'actinium' macnaheedu waa hooyada actinium |
_Warbixinta Protactinium
Protactinium waa mid cufan, silvery-cagaaran radioactive actinide. Waxay soo saartaa actinium-227 iyada oo loo marayo burburka. Waa labadaba sunta iyo si weyn radioactive, qiimaha ku saabsan $ 280,000 gram kasta.
Barnaamijyada
Cilmi baarista cilmiga, gaar ahaan geochronology (badaha da'da).
Xaqiiqo xiiso leh
Protactinium ku kacaysaa in ka badan $ 280,000 gram, taas oo ka dhigaysa mid ka mid ah kuwa ugu qaalisan ee dabiiciga ah ee ka dhaca.
Isotoobyo
| Tirada | Tirada | Half-Life | Xasiloon |
| 231 | 1.0% | 32,760 years | Ha |
Nidaamka
[Rn] 5f2 6d1 7s2