Atomic Properties of Pa
- Atomic Number of Pa
- 91
- Atomic Mass of Pa
- 231.0400 u
- Electron Configuration
- [Rn] 5f2 6d1 7s2
- Electronegativity
- 1.50
- Block
- f-block
- Group
- —
- Period
- 7
Protactinium lives in a heavily shielded study at the back of the lab, surrounded by thick notebooks and stricter safety signs than anyone else. He is brilliant, intense, and very hard to borrow.
He’s so rare and difficult to purify that just getting a small sample feels like winning a scientific lottery. As a result, he’s a bit suspicious of visitors. “Did you book time?” he asks, checking the schedule.
Protactinium mostly appears in research, helping scientists understand how the heavier actinides behave. He likes theory, careful measurements, and well-documented experiments.
He dresses simply but impeccably and insists on clean data and clean gloves.
Most people will never meet him directly, and that’s exactly how he likes it. Protactinium is a reminder that some parts of the periodic table are more library than playground.