noun
- A synthetic chemical element with atomic number 105, created by nuclear bombardment and named after the German nuclear physicist Otto Hahn.
Usage: chemistry; The element was officially renamed dubnium in 1997 by the International Union of Pure and Applied Chemistry (IUPAC).; Hahnium is now considered a former or historical name for element 105.
Examples
- Hahnium was first synthesized in 1970 by a team of Soviet scientists.
- The discovery of hahnium represented a major achievement in nuclear chemistry.
- Element 105 was originally called hahnium in honor of Otto Hahn's contributions to nuclear science.
- Scientists proposed the name hahnium to recognize the pioneering work in nuclear fission research.
- The periodic table once listed hahnium before the official adoption of the name dubnium.