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 ...

The real neptunium sits between uranium and plutonium in the actinides, the floating bar on the periodic table that pops out from between radium and lawrencium. A silvery, metallic substance like so ...

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 ...