Periodic Table of the Elements
Menu
Periodic Table

Search


 

Protactinium

Previous element Next element


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
printable version


discussion board
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

 
 
 
Copyright © 1998-2023 Jan Straka
All rights reserved. Czech version Czech version