fluorine

1) Fluorine 2) F 3) 9 4) 18.99 5) Gas 6) Comes from the Latin word "fluere" meaning "to flow" 7) Fluorine as flouride is added to drinking water (in very low concentrations) to protect teeth from bacteria 8) Fluorine renders tooth enamel relatively immune to bacteriological attack 9) Henri Moissan 10) In 1670 a recipe containing Bohemian emerald (now known as calcium fluoride) was used to etch glass. George Gore made a little fluorine through an electrolytic process but his apparatus exploded when the fluorine reacted with hydrogen. 11) No physical properties since it is a gas. 12) Melting Point: -219.6 °C Boiling Point: -188 °C 13) Compounds of Fluorine include halides, oxides, sulfides, hydrides, and complexes, lattice energies, and reduction potentials 14) No ions for Fluorine 15) Isotopes of Fluorine include isotope abundances, radioactive isotopes, isotope masses, nuclear spins, and nuclear magnetic moment 16) 17) Calcium: http://www.webelements.com/calcium/history.html 18) Video: http://video.google.com/videoplay?docid=7319752042352089988

Sources: [|www.webelements.com] http://www.lenntech.com/periodic-chart-elements/F-en.htmhttp://education.jlab.org/itselemental/ele009.html http://education.jlab.org/itselemental/ele009.html