Page 181 - The Periodic Table Book
P. 181

Uses                                                    HENRI MOISSAN


                                                                  In the early 1800s,
                                 These circuit breakers, containing a   chemists in Europe
                                  compound of  fluorine and sulfur, cut   realized that minerals
                                    electricity supply in an emergency.
                                                                  such as fluorite
                                                                  contained an unknown
                                                                  element. However, it
                                                                  took another 70 years
                                                                  before the French
                                                                  chemist Henri Moissan                              The Halogen Group
                                                                  extracted pure fluorine
                                                                  following a series of
                                                                  dangerous experiments
                                                                  that even poisoned
                                                                  him several times.




                            Etched glass vase
                                         Circuit breakers                        Fluorine-rich plastic
                                                                                 clothing repels water.
                                    These patterns
                                    form after the      Ceramic pot
                                    surface of  the glass
                                    is burned by an                            The shiny coating
                                    acidic fluorine                            on this ceramic dish
                                    compound.
                                                                               is from a fluorine-
                                                                               containing glaze.





                                                                                             Waterproof  clothing





                                                               Upon injection,
                                                                 this fluorine-
                                                PTFE           rich liquid heals
                                                                damaged tissues
                                             was used by           by carrying
                                            NASA to make        oxygen to them.
                This pan has a PTFE        spacesuits                         Oxycyte
               coating that resists heat.  because it protected
                                             against heat.        Some toothpastes contain
                                                                  fluorides that harden tooth enamel.







                     Non-stick pan                       Toothpaste


           Some glazes used to coat ceramics contain           slippery and prevents food that has burned while
           fluorine minerals. When heated, these glazes        cooking from sticking to the pan. Thin fibres
           release fluorine, which hardens the ceramic         made of PTFE are also used to make lightweight,
           underneath. Another compound called                 waterproof clothing. One of the most common
           polytetrafluoroethylene (PTFE) is commonly          uses of fluorine compounds is in toothpaste:
           used to make non-stick pans: this material is       they toughen teeth against decay.                     179





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