What is the Atomic Mass of Fluorine? Improve Improve Like Article Like Save Share Report Atomic Mass of Fluorine is . A) 19 B) 18 C) 20 D) 17 Answer: Option A) 19 is correct. Explanation: Atomic Mass of any substance is the sum of the number of protons and the number of neutrons in the nucleus of that atom. For Fluorine, Number of Protons = 9 Number of Neutrons = 10 Atomic Mass of Fluorine = 9 + 10 = 19 In absolute terms, the average atomic mass of Fluorine is 18.998403 amu. It is calculated taking into account all the isotopes of Fluorine. Last Updated : 21 Dec, 2023 Like Article Save Article Previous Nickel - Occurrence, Properties, Symbol, Uses, Facts Next What is the Atomic Mass of Hydrogen? Share your thoughts in the comments Add Your Comment Please Login to comment...