| Z | 91 |
|---|---|
| Symbol | Pa |
| Name | Protactinium |
| Periode | 7 |
| Atommasse Scalar | 231.03588 |
| Dichte Scalar | 15370 |
| Schmelzpunkt Scalar | 1873.15 |
| Siedepunkt Scalar | 4300 |
| Elektronegativität Scalar | 1.5 |
| Häufigkeit | <0.001 |
| Ionisationsenergie Scalar | 5.89 |
| Atomradius Scalar | 180 |
| Elektronenkonfiguration | [Rn] 5f2 6d1 7s2 |
| English name | Protactinium |
| oberer Nachbar | Pr |
| linker Nachbar | Th |
| rechter Nachbar | U |
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