Protactinium.pngProtactinium


Atomic Number: 91

Proton: 91

Electrons: 91

Neutrons: 140

Average Atomic Mass: 231.036 amu

Isotopes: 231Pa

Discovery: Protactinium was discovered by Otto Hahn, Lise Meitner, Frederick Soddy, John Cranston at 1913 in Germany, England.

Name: From the Greek word "protos" meaning "first" iodide PaI5 under vacuum.

Uses:none

Interesting Facts: It is one of the rarest and most expensive naturally occurring elements.It is one of the rarest and most expensive naturally occurring elements.

Video:


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Sources

金星(きんせい)by manimalmagic has fleas (don't touch)'s photostream

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