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|Section2= }} Atomic carbon (systematically named methanediylidene and carbon), also called monocarbon, is an inorganic chemical with the chemical formula C (also written ()). It is a gas that only exists above , below which it aggregates into graphite or other fullerenes. == Nomenclature == The trivial name ''monocarbon'' is the preferred IUPAC name. The systematic names, ''methanediylidene'' and ''carbon'', valid IUPAC names, are constructed according to the substitutive and additive nomenclatures, respectively. ''Methanediylidene'' is viewed as methane with all four hydrogen atoms removed. By default, this name pays no regard to the radicality of the atomic carbon. Although, in even more specific context, it can also name the non-radical excited states, whereas the radical ground state with two unpaired electrons is named ''methanediylylidene''. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「atomic carbon」の詳細全文を読む スポンサード リンク
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