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{{Element | name=Protactinium | symbol=Pa | anumber=91 | amass=231.03588 amu | state=Solid | class=Metallic | cstructure=Orthorhombic| color=silvery metallic, radioactive | date=1913 | discname=Kasimir Fajans and O.H. Göhring | origname=From the Greek ''Protos'' meaning ''first''. | uses=None | obtained=Occurs in minute trace amounts in [[uranium]] ores, but chiefly amongst the fission products of uranium, thorium, and plutonium. In 1961 the [[UK Atomic Energy Authority]] produced 125g of pure protactinium from uranium fuel elements, which represents the major world stock of protactinium. }}

{{Element | name=Protactinium | symbol=Pa | anumber=91 | amass=231.03588 amu | state=Solid | class=Metallic | cstructure=Orthorhombic| color=silvery metallic, radioactive | date=1913 | discname=Kasimir Fajans and O.H. Göhring | origname=From the Greek ''Protos'' meaning ''first''. | uses=None | obtained=Occurs in minute trace amounts in [[uranium]] ores, but chiefly amongst the fission products of uranium, thorium, and plutonium. In 1961 the [[UK Atomic Energy Authority]] produced 125g of pure protactinium from uranium fuel elements, which represents the major world stock of protactinium. }}

[[Category:Metals]]

[[Category:Metals]]

{{Template:Periodic table}}

{{Periodic table}}