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Moscovium is an extremely radioactive element: its most stable known isotope, moscovium-290, has a half-life of only 0.65 seconds. [9] In the periodic table, it is a p-block transactinide element. It is a member of the 7th period and is placed in group 15 as the heaviest pnictogen.
Albert Ghiorso (July 15, 1915 – December 26, 2010) was an American nuclear scientist and co-discoverer of a record 12 chemical elements on the periodic table. His research career spanned six decades, from the early 1940s to the late 1990s.
Isotopes of moscovium (8 P) Pages in category "Moscovium" The following 2 pages are in this category, out of 2 total. This list may not reflect recent changes. ...
moscovium, Mc, named after Moscow Oblast, where the element was discovered (2004). 116. livermorium, Lv, named after Lawrence Livermore National Laboratory, a collaborator with JINR in the discovery (2000). 117. tennessine, Ts, after Tennessee, where the berkelium target needed for the synthesis of the element was manufactured (2010). 118.
Ralph Arthur James (23 September 1920 in Salt Lake City, Utah [1] – 24 February 1973 in Alamo, California) was an American chemist at the University of Chicago who co-discovered the elements curium (1944) and americium (1944–1945). Later he worked at UCLA and for the Lawrence Livermore laboratory in California.
Moscovium (115 Mc) is a synthetic element, and thus a standard atomic weight cannot be given. Like all synthetic elements, it has no known stable isotopes. The first isotope to be synthesized was 288 Mc in 2004. There are five known radioisotopes from 286 Mc to 290 Mc. The longest-lived isotope is 290 Mc with a half-life of 0.65 seconds.
The heavier of the hypothetical proto-helium elements Mendeleev identified with coronium, named by association with an unexplained spectral line in the Sun's corona. A faulty calibration gave a wavelength of 531.68 nm, which was eventually corrected to 530.3 nm, which Grotrian and Edlén identified as originating from Fe XIV in 1939.
Europe and South America Bismuth was known since ancient times, but often confused with tin and lead, which are chemically similar. The Incas used bismuth (along with the usual copper and tin) in a special bronze alloy for knives. [43] Agricola (1530 and 1546) states that bismuth is a distinct metal in a family of metals including tin and lead ...