The Instrumentation Center

Protactinium

pa

 

 

 

 

 

 

 

 

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Symbol: Pa

Atomic Number: 91

Atomic Mass: 231.036 u

Electron Configuration: [Rn] 5f26d17s2 

Year Discovered: 1913

Discovered By: Kasimir Fajans and Otto Göhring 

Last Updated: 12/11/23