User:TyEvSkyo/Unbiunium
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| Unbiunium | ||||||
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| Pronunciation | /ˌuːnbaɪˈuːniəm/ | |||||
| Alternative names | element 121 | |||||
| Unbiunium in the periodic table | ||||||
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| Group | g-block groups (no number) | |||||
| Period | period 8 (theoretical, extended table) | |||||
| Block | g-block | |||||
| Electron configuration | [Og] 8s2 8p1 (predicted)[1] (predicted)[2] | |||||
| Electrons per shell | 2, 8, 18, 32, 33, 18, 8, 2 (predicted)[2] | |||||
| Physical properties | ||||||
| Color | silvery white or grey [3] | |||||
| Phase at STP | solid (predicted)[3] | |||||
| Melting point | 1800±500 K (1526.85±500 °C, 2780.33±900 °F) | |||||
| Atomic properties | ||||||
| Oxidation states | common: (none) (+3)[1][4] | |||||
| Ionization energies |
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| History | ||||||
| Naming | IUPAC systematic element name | |||||
| Isotopes of unbiunium | ||||||
| Template:infobox unbiunium isotopes does not exist | ||||||
Unbiunium /uːnbaɪˈuːniəm/ a hypothetical chemical element with the symbol Ubu and has the atomic number 121. nunennium and Uue are the temporary systematic IUPAC name and symbol, until a permanent name is decided upon. In the periodic table of the elements, it is expected to be a g-block element, and a superactinide metal. As of 2012[update], no attempt has been made to synthesize unbiunium.
Naming
[edit]Using the 1979 IUPAC recommendations, the element should be temporarily called unbiunium (symbol Ubu) until it is discovered, the discovery is confirmed, and a permanent name chosen.
Electron configuration
[edit]Unbiunium is the first element whose ground state electron configuration may contain an electron in a g subshell, which would make it the first element in the g-block. However, neither lanthanum nor actinium show such a predicted[by whom?] ground state for the f-block and have their last electron occupying a d orbital, so unbiunium's third electron should also hang up.[where?] Other elements have access to their g subshells, though not in their ground states. Computations have indicated that the ground state of the element would be [Uuo]8s25g1.Cite error: A <ref> tag is missing the closing </ref> (see the help page).[6][7] A predicted oxidation state is III.
References
[edit]- ^ a b 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.
- ^ a b c d http://www.princess-it.com/kp9/hrh-projects/file/20060327_sammakkee/lanchang/element/elements/121.htm
- ^ a b https://www.webelements.com/unbiunium/
- ^ Amador, Davi H. T.; de Oliveira, Heibbe C. B.; Sambrano, Julio R.; Gargano, Ricardo; de Macedo, Luiz Guilherme M. (12 September 2016). "4-Component correlated all-electron study on Eka-actinium Fluoride (E121F) including Gaunt interaction: Accurate analytical form, bonding and influence on rovibrational spectra". Chemical Physics Letters. 662: 169–175. Bibcode:2016CPL...662..169A. doi:10.1016/j.cplett.2016.09.025. hdl:11449/168956.
- ^ http://montessorimuddle.org/wp-content/uploads/2013/01/periodic-table-properties.xls.pdf
- ^ Seaborg (c. 2006). "transuranium element (chemical element)". Encyclopædia Britannica. Retrieved 2010-03-16.
- ^ Waber, J. T. (1969). "SCF Dirac–Slater Calculations of the Translawrencium Elements". The Journal of Chemical Physics. 51 (2): 664. doi:10.1063/1.1672054.
- Kaldor, Uzi (2005). "Superheavy Elements – Chemistry and Spectroscopy". Encyclopedia of Computational Chemistry. doi:10.1002/0470845015.cu0044. ISBN 0-470-84501-5.
- Seaborg, G T (1968). "Elements Beyond 100, Present Status and Future Prospects". Annual Review of Nuclear Science. 18: 53. doi:10.1146/annurev.ns.18.120168.000413.
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