 | ||||||
| Unbiunium | ||||||
|---|---|---|---|---|---|---|
| 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 | (+1), (+3) (predicted)[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
editUsing 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
editUnbiunium 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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