|
 |
|
name |
Protactinium |
latin |
Protactinium |
french |
Protactinium |
german |
Protactinium |
symbol |
Pa |
proton number |
91 |
atomic weight |
231.03588 |
Pauling electronegativity |
1.5 |
electronic configuration |
[Rn] 5f26d17s2 >> show long |
melting point |
1841 K, 1568°C, 2854°F |
boiling point |
- |
group |
- |
period |
7 |
state (by 20°C) |
solid |
oxidation states |
+4, +5 |
|
 printable version
 discussion board (1)
|
Discoverer
Year of discovery |
Discoverers |
1913 |
Otto Hahn (1879-1968) Lise Meitner (1878-1968) Frederick Soddy (1877-1956) John Cranston |
>> show more
|
|