| Attribute | Value |
|---|---|
| Symbol | Pa |
| Standard state | Solid |
| Atomic mass | 231.03588 u |
| Electron configuration | [Rn]7s²5f²6d¹ |
| Oxidation states |
|
| Electronegativity (pauling scale) | 1.5 |
| Atomic radius (van der waals) | 243 pm |
| Ionization energy | 5.89 eV |
| Melting point | 1845 K |
| Density | 15.37 g/cm³ |
| Atomic number | 91 |
| Group name | Actinide |
| Discovered | 1913 year |
| Electron affinity | Add |
| Boiling point | Add |