Fluorine on periodic table of the elements. Halogen and chemical element with symbol F and atomic number 9. Most electronegative element and extremely reactive. Topical fluoride reduces dental caries. Poster #573014422
Fluorine on periodic table of the elements. Halogen and chemical element with symbol F and atomic number 9. Most electronegative element and extremely reactive. Topical fluoride reduces dental caries. Poster #573014422
