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 ...

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.

This discovery is highly important for nuclear physics, particularly regarding transuranium elements, those beyond uranium on ...