Essential Facts
| Atomic number | 91 |
| Name | Protactinium |
| Symbol | Pa |
| Atomic mass | 231.036 |
| Classification | Actinide |
| State at 20°C | Solid |
| Melting point | 1600°C |
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Protactinium (Pa)Essential Facts
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Copyright © 2008-2012 Gary Wallace - All Rights Reserved |
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