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Pa - Protactinium - METAL ACTINIDES

1554°
4030°
231.03588
3
4
5
91
Pa
[Rn] 5f2 6d1 7s2
2
8
18
32
20
9
2
1.5
5.89
Synthetic
Radioactive
Liquid
Gaseous
Protactinium Electronic configuration diagram
Electronic configuration diagram

Name Protactinium
Number 91
Atomic 231.03588
Symbol Pa
Fusion 1554
Boiling 4030
Density 15.37
Period 7
Group 0
Discovery 1917 Hahn and Meitner
Abundance 0.001
Radius 0
Electronegativity 1.5
Ionization 5.89
Number of isotopes 14
Electronic configuration [Rn] 5f2 6d1 7s2
Oxidation states 3,4,5
Electron by energy level 2,8,18,32,20,9,2