Bohrium

Bohrium is element 107. A team led by Peter Armbruster and Gottfried Münzenberg at the GSI laboratory in Darmstadt, Germany, made it in 1981 by fusing chromium nuclei with bismuth. It is named after Niels Bohr, the Danish physicist whose model of the atom explained how electrons are arranged in shells.

Only a small number of bohrium atoms have ever been made, and they decay within seconds to minutes. Remarkably, in 2000 chemists in Switzerland studied six atoms and found that bohrium forms a compound with oxygen and chlorine, just as rhenium, the element above it, does. It has no uses beyond answering questions about how the heaviest atoms behave.