noun
- a synthetic radioactive chemical element with the symbol Db and atomic number 105
Usage: chemistry
Examples
- Dubnium is a highly unstable element that decays rapidly.
- Scientists first synthesized dubnium in particle accelerators.
- The element dubnium was named after the Russian city of Dubna.
- Dubnium has no known biological role due to its extreme instability.
- Only a few atoms of dubnium can be produced at a time.
- The discovery of dubnium was disputed between Russian and American research teams.