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  • 🇬🇧 Ununennium
  • 🇨🇳 not available
  • 🇳🇱 Ununennium
  • 🇫🇷 Ununennium
  • 🇩🇪 Ununennium
  • 🇮🇱 
  • 🇮🇹 Ununenio
  • 🇯🇵 
  • 🇵🇹 Ununenio
  • 🇷🇺 
  • 🇪🇸 Ununenio
  • 🇸🇪 Ununenium

Ununennium: the essentials

Ununennium atoms have 119 electrons and the shell structure is 2.8.18.32.32.18.8.1. The ground state electronic configuration of neutral ununennium is [Og].8s1 (a guess based upon that of caesium and francium) and the term symbol of ununennium is 2S1/2.

Ununennium: description  

Ununennium, also known as element 119 (or eka-francium), is the as yet unknown chemical element with atomic number 119 and symbol Uue. Ununennium 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 an s-block element, an alkali metal, and the first element in the eighth period.

Ununennium is the first element that has not yet been synthesized. To date, all attempts to synthesize this element have been unsuccessful. Its position as the seventh alkali metal suggests that it would have similar properties to the alkali metals, lithium, sodium, potassium, rubidium, caesium, and francium; however, relativistic effects may cause some of its properties to differ from those expected from a straight application of periodic trends. For example, ununennium is expected to be less reactive than caesium and francium and be closer in behavior to potassium or rubidium, and while it should show the characteristic +1 oxidation state of the alkali metals, it is also predicted to show the +3 oxidation state unknown in any other alkali metal.

Ununennium: physical properties

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Ununennium: heat properties

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Ununennium: electronegativities

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Ununennium: orbital properties

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Ununennium: abundances

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Ununennium: crystal structure

Uue crystal structure
The solid state structure of ununennium is: bcc (body-centred cubic).

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Ununennium: biological data

Since element 119 is unknown, it has no biological role.

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Ununennium: uses

Uses...

Ununennium: reactions

Reactions of ununennium as the element with air, water, halogens, acids, and bases where known.

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Ununennium: binary compounds

Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of ununennium where known.

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Ununennium: compound properties

Bond strengths; lattice energies of ununennium halides, hydrides, oxides (where known); and reduction potentials where known.

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Ununennium: history

Ununennium was discovered by (no claim for discovery made) in (no claim for discovery made) at (no claim for discovery made). Origin of name: temporary systematic IUPAC nomenclature.

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Ununennium: isotopes

Isotope abundances of ununennium
Isotope abundances of ununennium with the most intense signal set to 100%.

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Ununennium: isolation

Isolation: as this element is unknown it has never never been isolated.