Submitted by György Chityil ... on Fri, 01/19/2018 - 22:19 Hierarchy: NounDescription: {{isotope}} The only stable isotope of fluorine, {{nuclide|19|9|F}}; it has nine protons and ten neutronsNgram: fluorine-19Ngram Text: fluorine-19Source: WiktionaryIssue: 0Wiktionary tag: isotopenuclide199fNgram Count: 1