Protactinium es un elemento chimic de symbolo Pa e numero atomic 91.
Nota
Factos in breve Iso., AN ...
| Thorium ← Protactinium → Uranium |
| Apparentia |
| lustro brillante argentee metallic |
| Proprietates atomic |
| Nomine, symbolo, numero |
Protactinium, Pa, 91 |
| Serie chimic |
actinido |
| Gruppo, periodo, bloco |
3, 7, f |
| Configuration electronic |
[Ra] 7s2 5f2 6d1 |
| Electronegativitate |
1,5 |
| Proprietates physic |
| Stato |
solido |
| Massa molar |
231,03588 g·mol-1 |
| Densitate |
15,37 g·cm-3 |
| Puncto de fusion |
1841 K, 1568 °C, 2854 °F |
| Puncto de ebullition |
4300? K, 4027? °C, 7280? °F |
| Calor de fusion |
12,34 kJ·mol−1 |
| Calor de vaporisation |
481 kJ·mol-1 |
| Calor specific |
26,230 J·mol-1·K-1 |
| Resistivitate electric |
(0 °C) 177 nΩ·m |
| Conductivitate thermal |
47 W·m-1·K-1 |
| Isotopos |
| Iso. | AN | Semivita | MD | ED (MeV) | PD |
|---|
| 231Pa |
~100% |
32760 a |
α |
5,149 |
227Ac |
|
| Valores in unitates SI e in le conditiones normal del material (25 °C, 100 kPa) si non indica al contrario. |
|
Clauder
