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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 ...
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]
In Europe, the metal was being produced and used by 1540, when it was described by Vannoccio Biringuccio. [23] Described again by Georgius Agricola De re metallica in 1556. Probably first recognised as an element by Lavoisier in 1787. [3] 16 Sulfur: Before 2000 BC Middle East: Middle East: First used at least 4,000 years ago. [24]
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 ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 22 February 2025. Periodic table of the elements with eight or more periods Extended periodic table Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium ...
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.
Isotopes of ununennium (1 P) Pages in category "Ununennium" The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. ...
Columbus before the Queen, imagined by Emanuel Gottlieb Leutze, 1843. This timeline of European exploration lists major geographic discoveries and other firsts credited to or involving Europeans during the Age of Discovery and the following centuries, between the years AD 1418 and 1957.