Superheavy Elements Are Breaking the Periodic Table
A t the far end of the periodic table is a realm where nothing is quite as it should be. The elements here, starting at atomic number 104 (rutherfordium), have never been found in nature. In fact, they’d emphatically prefer not to exist. Their nuclei, bursting with protons and neutrons, tear themselves apart via fission or radioactive decay within instants of their creation.
These are the superheavy elements: after rutherfordium come dubnium, seaborgium, bohrium, and other oddities, all the way up to the heaviest element ever created, oganesson, element 118. Humans have only ever made vanishingly small amounts of these elements. As of 2020, 18 years after the first successful creation of oganesson in a laboratory, scientists had reported making a total of five atoms of it. Even if they could make much more, it would never be the kind of stuff you could hold in your hand—oganesson is so radioactive that it would be less matter, more heat.
Using ultrafast, atom-at-a-time methods, researchers are starting to explore this unmapped region of the periodic table and finding it as fantastical as any medieval cartographer’s imaginings. Here at the uncharted coastline of chemistry, atoms have a host of weird properties, from pumpkin-shaped nuclei to electrons bound so tightly to the nucleus they’re subject to the rules of relativity, not unlike objects orbiting a black hole.
