Plutonium's in a part of the periodic table called the actinide series alongside its neighbours thorium and protoactinium. Seaborg christened the actinides, rearranging the periodic table in the ...
There are currently 118 known elements listed on the periodic table; from hydrogen ... by bombarding plutonium-244, an ...
Currently, there are 118 known elements on the periodic table, from hydrogen all the way ... They bombarded the isotope plutonium-244 with additional neutrons and vaporized ions of titanium.