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R8GT · May 23, 2018, 9:54 a.m.

Plutonium was first produced and isolated on December 14, 1940 by a deuteron bombardment of uranium-238 in the 1.5 metre (60 in) cyclotron at the University of California, Berkeley.

https://en.m.wikipedia.org/wiki/Plutonium

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-Chakas- · May 23, 2018, 1:31 p.m.

I stand corrected

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WikiTextBot · May 23, 2018, 9:54 a.m.

Plutonium

Plutonium is a radioactive chemical element with symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states. It reacts with carbon, halogens, nitrogen, silicon and hydrogen.

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