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Periodic Table

Picture of  Protactiniu

 Atomic No. Order:

 Alphabetic Order:

Ground State Electron Configuration of  Protactiniu
Symbol: Pa
Atomic Number: 91
Atomicmass: 231.0359 g.mol -1
Electronegative (According to Pauling): 1.5
Density: 15.37 g.cm-3 at 20°C
Melting Point: 1600 °C
Boiling Point: unknown
Venderwaals Radius: unknown
Ionic Radius: unknown
Isotopes: 5
Electronic Shell: [ Rn ] 5f2 6d1 7s2
Energy Of First Ionization:  


No of Protons
Standard Potential:

Electron in Full Shell
Discoverd By: Discovered by K. Kajans and O.H. Gohring in 1913

Electron in Partial Shell

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