Unbiunium

Unbiunium, ₀₀Ubu
Unbiunium
Pronunciation	/ˌuːnbaɪˈuːniəm/ (OON-by-OON-ee-əm)
Alternative names	element 121, eka-actinium
Unbiunium in the periodic table
	unbinilium ← unbiunium → unbibium
Group	g-block groups (no number)
Period	period 8 (theoretical, extended table)
Block	g-block
Electron configuration	[Og] 8s2 8p1 (predicted)
Electrons per shell	2, 8, 18, 32, 32, 18, 8, 3; (predicted)
Physical properties
Phase at STP	solid (predicted)
Melting point	950.15 K (677 °C, °F)
Boiling point	1985.15 K (1714 °C, °F)
Atomic properties
Oxidation states	(+1), (+3) (predicted)
Ionization energies	1st: 429 (predicted) kJ/mol ; ;
Other properties
CAS Number	54500-70-8
History
Naming	IUPAC systematic element name
Isotopes of unbiunium
	Template:infobox unbiunium isotopes does not exist

Unbiunium is a hypothetical (theoretical or imagined) element of the periodic table. It is also known as eka-actinium or dvi-lanthanum. Its atomic number should be 121 and it has the symbol Ubu. The name Unbiunium and the symbol Ubu are temporary IUPAC names (meaning "one-two-one" in Latin). This name and symbol exist until a permanent name is decided and the element is created. It is expected to be a F-block element and in a group call the superactinides or Unbiunoids. It is the third element in the eighth period of the periodic table.

Creation attempts

The synthesis of unbiunium was first attempted in 1977 by bombarding a target of uranium-238 with copper-65 ions at the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany:

²³⁸U + ⁶⁵Cu → ³⁰³Ubu

No atoms were identified.^[3]

Another alternative name is "Lavoisium".

References

1 2 3 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.
↑ 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.
↑ Hofmann, Sigurd (2002). On Beyond Uranium. Taylor & Francis. p. 105. ISBN 978-0-415-28496-7.

[Haire-1] 1 2 3 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.

[Amador-2] 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.

[beyonduranium-3] Hofmann, Sigurd (2002). On Beyond Uranium. Taylor & Francis. p. 105. ISBN 978-0-415-28496-7.

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