Untrioctium

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138 Uts ← untrioctium → Ute

↑
Uto
↓
Uoo
General
Name, Symbol, Number untrioctium, Uto, 138
Chemical series Superactinides
Group, Period, Block g18, 8, g
Appearance unknown
Standard atomic weight [366] u (supposition)  g·mol−1
Electron configuration [Uuo] 5g18 8s2
Electrons per shell 2, 8, 18, 32, 50, 18, 8, 2
Physical properties
Phase presumably solid
Miscellaneous
Selected isotopes
Main article: Isotopes of untrioctium
iso NA half-life DM DE (MeV) DP
References

Untrioctium (pronounced /ˌʌntraɪˈɒktiəm/) is an unsynthesized chemical element with atomic number 138 and symbol Uto.

The name untrioctium is a temporary IUPAC systematic element name.

Contents

[edit] History

The name untrioctium is used as a placeholder, as in scientific articles about the search for element 138. Transuranic elements (those beyond uranium) are, except for microscopic quantities and except for plutonium, always artificially produced, and usually end up being named for a scientist or the location of a laboratory that does work in atomic physics (see systematic element name for more information).

[edit] Significance

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The element is the first element with a filled type G electron shell, holding 18 electrons, in its ground state.

[edit] External links

[edit] See also