oganesson
noun
- synthetic chemical element with symbol Og and atomic number 118
noun
- element with the atomic number of 118
Wiktionary
Pronunciation: /oʊɡəˈnɛsɒn/ / /ˌɒɡəˈnɛsɒn/
noun
Etymology: From Oganessian + -on. Promulgated in June 2016 by IUPAC based on recommendations of the Joint Institute for Nuclear Research and Lawrence Livermore National Laboratory to honor Russian-Armenian physicist Yuri Oganessian (born 1933) who researched superheavy elements. Suffix -on, rather than -ium, is because it is a noble gas (like neon or argon).
- The chemical element (symbol Og) with atomic number 118. It is the heaviest known element. Highly radioactive, it does not occur naturally. Originally expected to be a noble gas, it is now predicted to be a reactive metallic solid, and a semiconductor or a post-transition metal.
“SINGAPORE - The four new elements announced in December last year have received their new names: Nihonium (Nh), moscouvium (Mc), tennessine (Ts) and oganesson (Og).”
“In January 2016 the International Union of Pure and Applied Chemistry (IUPAC) announced the discovery of four new elements, so completing the seventh row of the periodic table. They have since been named as nihonium, Nh, muscovium^([sic]), Mc, tennessine, Ts, and organesson^([sic]), Og. The procedures for naming new elements are clearly laid out by IUPAC.”