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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. File:European History.pdf - Wikipedia

   en.wikipedia.org/wiki/File:European_History.pdf

   The LaTeX source code is attached to the PDF file (see imprint). Licensing Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License , Version 1.2 or any later version published by the Free Software Foundation ; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover ...

4. Timeline of discovery of Solar System planets and their moons

   en.wikipedia.org/wiki/Timeline_of_discovery_of...

   The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...

5. History of Europe - Wikipedia

   en.wikipedia.org/wiki/History_of_Europe

   The history of Europe is traditionally divided into four time periods: prehistoric Europe (prior to about 800 BC), classical antiquity (800 BC to AD 500), the Middle Ages (AD 500–1500), and the modern era (since AD 1500). The first early European modern humans appear in the fossil record about 48,000 years ago, during the Paleolithic era.

6. Timeline of atomic and subatomic physics - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_atomic_and...

   1897 J. J. Thomson discovered the electron; 1897 Emil Wiechert, Walter Kaufmann and J.J. Thomson discover the electron; 1898 Marie and Pierre Curie discovered the existence of the radioactive elements radium and polonium in their research of pitchblende; 1898 William Ramsay and Morris Travers discover neon, and negatively charged beta particles

7. Extended periodic table - Wikipedia

   en.wikipedia.org/wiki/Extended_periodic_table

   The first two elements of period 8 will be ununennium and unbinilium, elements 119 and 120. Their electron configurations should have the 8s orbital being filled. This orbital is relativistically stabilized and contracted; thus, elements 119 and 120 should be more like rubidium and strontium than their immediate neighbours above, francium and ...

8. Category:Ununennium - Wikipedia

   en.wikipedia.org/wiki/Category:Ununennium

   Download as PDF; Printable version; In other projects Wikimedia Commons; ... Pages in category "Ununennium" The following 4 pages are in this category, out of 4 total.

9. Alkali metal - Wikipedia

   en.wikipedia.org/wiki/Alkali_metal

   The stabilisation of ununennium's valence electron and thus the contraction of the 8s orbital cause its atomic radius to be lowered to 240 pm, [36]: 1729–1730 very close to that of rubidium (247 pm), [5] so that the chemistry of ununennium in the +1 oxidation state should be more similar to the chemistry of rubidium than to that of francium.