unbibium
Sign in to saveAlso known as Ubb, eka-thorium, element 122
Unbibium, also known as element 122 or eka-thorium, is a hypothetical chemical element; it has placeholder symbol Ubb and atomic number 122. Unbibium and Ubb are the temporary systematic IUPAC name and symbol respectively, which are used until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table of the elements, it is expected to follow unbiunium as the second element of the superactinides and the fourth element of the 8th period. Similarly to unbiunium, it is expected to fall within the range of the island of stability, potentially conferring addit
Wikidata facts
- Subclass of
- superactinide
- Part of
- period 8
Show 2 more facts
- element symbol
- Ubb
- atomic number
- 122
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~17 min read
Encyclopedic overview
15 sectionsContents
- Introduction
- History
- Synthesis attempts
- Fusion-evaporation
- Compound nucleus fission
- Claimed discovery as a naturally occurring element
- Naming
- Prospects for future synthesis
- Predicted properties
- Nuclear stability and isotopes
- Chemical
- Notes
- References
- Bibliography
- External links
Unbibium, also known as element 122 or eka-thorium, is a hypothetical chemical element; it has placeholder symbol Ubb and atomic number 122. Unbibium and Ubb are the temporary systematic IUPAC name and symbol respectively, which are used until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table of the elements, it is expected to follow unbiunium as the second element of the superactinides and the fourth element of the 8th period. Similarly to unbiunium, it is expected to fall within the range of the island of stability, potentially conferring additional stability on some isotopes, especially 306Ubb which is expected to have a magic number of neutrons (184).
Despite several attempts, unbibium has not yet been synthesized, nor have any naturally occurring isotopes been found to exist. There are currently no plans to attempt to synthesize unbibium. In 2008, it was claimed to have been discovered in natural thorium samples, but that claim has now been dismissed by recent repetitions of the experiment using more accurate techniques.
Excerpted from Wikipedia’s “unbibium” article, available under the CC BY-SA 4.0 licence.