Unbiseptium

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Unbiseptium
127Ubs
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Ununtrium (other metals (predicted))
Flerovium (other metals (predicted))
Ununpentium (other metals (predicted))
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Ununseptium (metalloid (predicted))
Ununoctium (noble gas (predicted))
Ununennium (alkali metal (predicted))
Unbinilium (alkaline earth metal (predicted))
Unquadunium (superactinide (predicted))
Unquadbium (superactinide (predicted))
Unquadtrium (superactinide (predicted))
Unquadquadium (superactinide (predicted))
Unquadpentium (superactinide (predicted))
Unquadhexium (superactinide (predicted))
Unquadseptium (superactinide (predicted))
Unquadoctium (superactinide (predicted))
Unquadennium (superactinide (predicted))
Unpentnilium (superactinide (predicted))
Unpentunium (superactinide (predicted))
Unpentbium (superactinide (predicted))
Unpenttrium (superactinide (predicted))
Unpentquadium (superactinide (predicted))
Unpentpentium (superactinide (predicted))
Unpenthexium (transition metal (predicted))
Unpentseptium (transition metal (predicted))
Unpentoctium (transition metal (predicted))
Unpentennium (transition metal (predicted))
Unhexnilium (transition metal (predicted))
Unhexunium (transition metal (predicted))
Unhexbium (transition metal (predicted))
Unhextrium (transition metal (predicted))
Unhexquadium (transition metal (predicted))
Unhexpentium (alkali metal (predicted))
Unhexhexium (alkaline earth metal (predicted))
Unhexseptium (other metals (predicted))
Unhexoctium (other metals (predicted))
Unhexennium (other metals (predicted))
Unseptnilium (other metals (predicted))
Unseptunium (diatomic nonmetal (predicted))
Unseptbium (noble gas (predicted))
Unbiunium (superactinide (predicted))
Unbibium (superactinide (predicted))
Unbitrium (superactinide (predicted))
Unbiquadium (superactinide (predicted))
Unbipentium (superactinide (predicted))
Unbihexium (superactinide (predicted))
Unbiseptium (superactinide (predicted))
Unbioctium (superactinide (predicted))
Unbiennium (superactinide (predicted))
Untrinilium (superactinide (predicted))
Untriunium (superactinide (predicted))
Untribium (superactinide (predicted))
Untritrium (superactinide (predicted))
Untriquadium (superactinide (predicted))
Untripentium (superactinide (predicted))
Untrihexium (superactinide (predicted))
Untriseptium (superactinide (predicted))
Untrioctium (superactinide (predicted))
Untriennium (superactinide (predicted))
Unquadnilium (superactinide (predicted))
Unsepttrium (eka-superactinide (predicted))
Unseptquadium (eka-superactinide (predicted))
Unseptpentium (eka-superactinide (predicted))
Unsepthexium (eka-superactinide (predicted))
Unseptseptium (eka-superactinide (predicted))
Unseptoctium (eka-superactinide (predicted))
Unseptennium (eka-superactinide (predicted))
Unoctnilium (eka-superactinide (predicted))
Unoctunium (eka-superactinide (predicted))
Unoctbium (eka-superactinide (predicted))
Unocttrium (eka-superactinide (predicted))
Unoctquadium (eka-superactinide (predicted))
-

Ubs

(?)
unbihexiumunbiseptium → unbioctium
Unbiseptium in the periodic table
General properties
Name, symbol, number unbiseptium, Ubs, 127
Pronunciation /ˌnbˈsɛptiəm/
Element category superactinide
Group, period, block n/a, 8, g
Standard atomic weight unknown
Electron configuration [Uuo] 5g3 6f2 8s2 8p2
(predicted)[1]
2, 8, 18, 32, 35, 20, 8, 4
(predicted)
Physical properties
unknown
Atomic properties
unknown
History
Naming IUPAC systematic element name
· references

Unbiseptium /ˌnbˈsɛptiəm/, also called eka-americium[citation needed], is the hypothetical chemical element with atomic number 127 and symbol Ubs. It comes immediately after unbihexium, element 126, which is expected to be the most stable element on an island of stability.[2]

Naming[edit]

The name unbiseptium is a systematic element name, used as a placeholder until its discovery is confirmed. Transuranium elements beyond californium are always created artificially, and the element usually ends up being named for a scientist or a laboratory that does work in atomic physics.[citation needed]

Synthesis of unbiseptium[edit]

Unbiseptium has had one failed attempt at synthesis in 1978 at the Darmstadt UNILAC accelerator by bombarding a natural tantalum target with xenon ions:[2]

\,^{nat}_{73}\mathrm{Ta} +  \,^{136}_{54}\mathrm{Xe} \to \,^{316, 317}\mathrm{Ubs} ^{*} \to \mbox{no atoms}.

Target-projectile combinations leading to Z=127 compound nuclei[edit]

The below table shows various combinations of targets and projectiles leading to compound nuclei with an atomic number of 127.

Target Projectile CN Attempt result
180mTa 136Xe 316Ubs Failure to date
181Ta 136Xe 317Ubs Failure to date

References[edit]

  1. ^ Haire, Richard G. (2006). "Transactinides and the future elements". In Morss; Edelstein, Norman M.; Fuger, Jean. The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media. ISBN 1-4020-3555-1. 
  2. ^ a b Emsley, John (2011). Nature's Building Blocks: An A-Z Guide to the Elements (New ed.). New York, NY: Oxford University Press. p. 593. ISBN 978-0-19-960563-7. 

See also[edit]

Legend
Alkali metal Alkaline earth metal Super­actinide Eka-​super­actinide Lan­thanide Actinide Transition metal Other metal Metalloid Polyatomic nonmetal Diatomic nonmetal Noble gas
predicted predicted predicted predicted     predicted predicted predicted predicted predicted predicted