Ununseptium is the current name of the artificial chemical element with atomic number 117. The second-heaviest known element and second-to-last element of the 7th period of the periodic table, its discovery was announced in Dubna, Russia, by a Russian–American collaboration in 2010, making it the most recently discovered element. One of its daughter isotopes was created in 2011, partially confirming the results. The experiment was repeated successfully by the same collaboration in 2012 and by a joint German–American team in 2014. When these experiments have been examined and verified by the Joint Working Party, the discoverers will be invited to give the element an official name. Some of ununseptium's isotopes are expected to lie within the island of stability, a predicted group of nuclides of enhanced stability with atomic numbers around 120, but the isotopes of ununseptium created so far have had predicted half-lives of less than one second. Like fluorine, chlorine, and other halogens, ununseptium is expected to be a group 17 element, but it is not currently expected to be a halogen, as some of its properties are likely to be different due to relativistic effects.
Read more: https://en.wikipedia.org/wiki/Ununseptium
_______________________________ Today's selected anniversaries:
1161:
Emperor Hailing of the Jin dynasty was assassinated in a military camp near the Yangtze River front following Jin losses in the Battle of Caishi. https://en.wikipedia.org/wiki/Prince_Hailing_of_Jin
1467:
Troops under Stephen III of Moldavis defeated the forces of Matthias Corvinus of Hungary in present-day Baia, Romania. https://en.wikipedia.org/wiki/Battle_of_Baia
1943:
World War II: American and Australian forces began the Battle of Arawe as a diversion before a larger landing at Cape Gloucester on New Britain. https://en.wikipedia.org/wiki/Battle_of_Arawe
1995:
The European Court of Justice handed down the Bosman ruling, allowing footballers in the European Union to freely transfer from one UEFA Federation to another at the end of their contracts. https://en.wikipedia.org/wiki/Bosman_ruling
2005:
The F-22 Raptor, a stealth fighter aircraft that the United States Air Force claimed is unmatched by any known or projected fighter, entered into service despite a protracted and costly development period. https://en.wikipedia.org/wiki/Lockheed_Martin_F-22_Raptor
_____________________________ Wiktionary's word of the day:
parsimonious: 1. Exhibiting parsimony; sparing in expenditure of money; frugal to excess; penurious; niggardly; stingy. 2. (sports) Not conceding many goals. 3. Using a minimal number of assumptions, steps, or conjectures. https://en.wiktionary.org/wiki/parsimonious
___________________________ Wikiquote quote of the day:
The meanings of poetry take their growth through the interaction of the images and the music of the poem. --Muriel Rukeyser https://en.wikiquote.org/wiki/Muriel_Rukeyser