Unbihexium
Unbihexium, also known as element 126 or eka-plutonium, is the possible chemical element with atomic number 126 and placeholder symbol Ubh. Unbihexium and Ubh are the temporary IUPAC name and symbol, until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table, unbihexium is expected to be a g-block superactinide and the eighth element in the 8th period.
| General properties | |||||||||||||||||||||
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| Alternative names | element 126, eka-plutonium | ||||||||||||||||||||
| Appearance | possibly silvery gray[1] | ||||||||||||||||||||
| Unbihexium in the periodic table | |||||||||||||||||||||
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| Atomic number (Z) | 126 | ||||||||||||||||||||
| Group | unknown group | ||||||||||||||||||||
| Period | period 8 | ||||||||||||||||||||
| Block | g-block | ||||||||||||||||||||
| Element category | superactinide | ||||||||||||||||||||
| Electron configuration | [Og] 5g2 6f3 8s2 8p1 (predicted)[2] | ||||||||||||||||||||
Electrons per shell | 2, 8, 18, 32, 34, 21, 8, 3 (predicted) | ||||||||||||||||||||
| Physical properties | |||||||||||||||||||||
| Phase at STP | Ubh: | ||||||||||||||||||||
| Melting point | >873.15° K (>600° °C, >1112° °F) | ||||||||||||||||||||
| Boiling point | >1773.15° K (>1500° °C, >2732° °F) | ||||||||||||||||||||
| Atomic properties | |||||||||||||||||||||
| Oxidation states | (+1), (+2), (+4), (+6), (+8) (predicted)[3] | ||||||||||||||||||||
| Other properties | |||||||||||||||||||||
| Natural occurrence | Ubh: | ||||||||||||||||||||
| CAS Number | 54500-77-5 | ||||||||||||||||||||
| History | |||||||||||||||||||||
| Naming | IUPAC systematic element name | ||||||||||||||||||||
| Main isotopes of unbihexium | |||||||||||||||||||||
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References
- ↑ 1.0 1.1 "Unbihexium". www.chemeurope.com. Retrieved 2021-02-07.
- ↑ Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria (2006). "Transactinides and the future elements". In Morss; Edelstein, Norman M.; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media. ISBN 978-1-4020-3555-5.
- ↑ Pyykkö, Pekka (2011). "A suggested periodic table up to Z≤ 172, based on Dirac–Fock calculations on atoms and ions". Physical Chemistry Chemical Physics. 13 (1): 161–8. Bibcode:2011PCCP...13..161P. doi:10.1039/c0cp01575j. PMID 20967377.
