| 231.0359 Atomic Weight | |
| 91 Atomic Number | 5, 4 Oxidation States |
| 4300 Boiling Point, K | |
| 1845 Melting Point, K | Pa Symbol |
| 15.4 Density at 300K | |
| [Rn] 5f2 6d1 7s2
Electron Configuration | |
| Protactinium | |
| Pa Symbol | Orthorhombic Crystal Structure |
| 1.5 Electronegativity | |
| 1.61 Atomic Radius | |
| 15 Atomic Volume | |
| 5.88 Ionization Potential | 5.6 Electrical Conductivity |
| 47 Thermal Conductivity |