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  2. Ununennium - Wikipedia

    en.wikipedia.org/wiki/Ununennium

    This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Hypothetical chemical element, symbol Uue and atomic number 119 Chemical element with atomic number 119 (Uue) Ununennium, 119 Uue Theoretical element Ununennium Pronunciation / ˌ uː n. uː n ˈ ɛ n i ə m / ⓘ (OON -oon- EN -ee-əm) Alternative names element 119, eka-francium ...

  3. Category:Ununennium - Wikipedia

    en.wikipedia.org/wiki/Category:Ununennium

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  4. Discovery of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Discovery_of_chemical_elements

    Perey discovered it as a decay product of 227 Ac. [184] Francium was the last element to be discovered in nature, rather than synthesized in the lab, although four of the "synthetic" elements that were discovered later (plutonium, neptunium, astatine, and promethium) were eventually found in trace amounts in nature as well. [185]

  5. Template:Infobox ununennium - Wikipedia

    en.wikipedia.org/wiki/Template:Infobox_ununennium

    Ununennium, 119 Uue; Theoretical element; Ununennium; Pronunciation / ˌ uː n. uː n ˈ ɛ n i ə m / ⓘ (OON-oon-EN-ee-əm) Alternative names: element 119, eka-francium: Ununennium in the periodic table

  6. Naming of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Naming_of_chemical_elements

    Suffixes were used more inconsistently before 1784, with tungsten (discovered 1783) the last element discovered whose English name lacks a standard suffix. [41] The naming rules promulgated by IUPAC in 2002 declared that all newly discovered elements should have names ending in -ium, for linguistic consistency. [40]

  7. Timeline of scientific discoveries - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_scientific...

    The timeline begins at the Bronze Age, as it is difficult to give even estimates for the timing of events prior to this, such as of the discovery of counting, natural numbers and arithmetic. To avoid overlap with timeline of historic inventions , the timeline does not list examples of documentation for manufactured substances and devices unless ...

  8. Timelines of world history - Wikipedia

    en.wikipedia.org/wiki/Timelines_of_world_history

    These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history; For events from c. 500 – c. 1499, see: Timeline of post-classical history; For events from c. 1500, see: Timelines of modern history

  9. Isotopes of ununennium - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_ununennium

    The synthesis of ununennium was first attempted in 1985 by bombarding a sub-microgram target of einsteinium-254 with calcium-48 ions at the superHILAC accelerator at Berkeley, California: 254 99 Es + 48 20 Ca → 302 119 Uue * → no atoms. No atoms were identified, leading to a limiting cross section of 300 nb. [29]

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