Ununbiyum
Ununbiyum is a synthetic chemical element with the symbol Uub and atomic number 129. It is a transient radioactive element in the actinide series, which is part of the broader category of transactinide elements. The name "ununbiyum" is derived from the systematic element name, combining the Latin prefixes *uni-* (meaning 1), *un-* (meaning 100), and *biy-* (meaning 2), followed by the suffix *-um*, reflecting its temporary designation as element 129.
Ununbiyum has not been definitively synthesized or confirmed due to its extremely short half-life and the challenges
The element was first reported in 2004 by a joint Russian-American team at the Joint Institute for
Due to its transient nature and lack of confirmed synthesis, ununbiyum has no known stable isotopes or