Hassium is a synthetic element that was first produced by fusing lead and iron atoms together using a linear accelerator. Its discovery was confirmed by German scientists in 1984 at the Institute for Heavy Ion Research (Gesellschaft für Schwerionenforschung) in Darmstadt, Germany. While Hassium has no known natural occurrence, it is believed to be present in trace quantities in uranium ores.

Hassium is highly unstable, and its longest-lived isotope, Hassium-270, has a half-life of only 10 seconds. As a result, its chemical properties are not well understood. Computational studies suggest that Hassium behaves similarly to its periodic table neighbors, osmium and iridium, but experimental data is limited.

Due to its radioactive and highly unstable nature, there are no practical uses for Hassium beyond basic scientific research.