 |
Pa |
Protactinium |
Pa | |
Atomic number |
|
91 | Atomic weight | 231.035882 amu | Stable and very long lived isotopes | N/A | Electronic configuration | 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p67s26d15f2 | Sample compounds | PaI5
| Density |
15.37 g/cm3 (STP) |
Melting | 1600 °C |
Boiling | 4030 °C |
Covalent radius | N/A Å |
Van der Waals radius | Å |
Ionic radius | 0.78 Å |
First ionization potential | 5.887 eV = 47481 cm-1 = 568.0 kJ/mol
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Electron affinity | |
Wikipedia article about Protactinium |
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