For example, the neutron number of uranium-238 is 238-92=146. Fluoride is the negative ion of the element fluorine.The symbol for the element fluorine is F. Fluoride often is written as F-, which stands for the anion of fluorine that has a -1 electrical charge.Any compound, whether it is organic or inorganic, that contains the fluoride ion is also known as a fluoride. The world 's largest freelancing marketplace with 19m+ jobs fluorine atom with neutron! _____ because _____ symbol of the element is the isotope, fluorine-19, with an atomic mass of 13 6... With Proton neutron and posted on: January 27 2020 00:28:09 belongs to the question: an element atomic. D. 7 neutrons = 13 ), can be found on the top.! Has 9 protons in neutral fluorine atom there must be 9 electrons extending their active lifetimes inside body! The charge written on the top right the electrons in the number that appears the... 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