Protactinium


Protactinium is a radioactive element used in nuclear reactors and as a precursor to uranium.

Atomic Structure

protactinium atom electronic configuration

Atomic Information

Property Value
Atomic Number 91
Symbol Pa
Atomic Mass 231.04 u
Electron Configuration [Rn] 5f2 6d1 7s2
State at Room Temperature Solid

Uses of Protactinium