Protactinium
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| Symbol | Pa |
|---|---|
| Atomic number | 91 |
| Atomic mass | 231. 03588 u |
| Electron configuration | [Rn] 5f26d17s2 |
| Discovered | 1913 |
| Did you know | Protactinium's most stable isotope, protactinium-231, has a half-life of about 32,760 years. |
| Date of Reg. | |
| Date of Upd. | |
| ID | 776594 |
About Protactinium
Protactinium is a chemical element with the symbol Pa and atomic number 91. It is a dense, silvery-gray actinide metal which readily reacts with oxygen, water vapor and inorganic acids.
Protactinium Photos
