41. They are generally very strong because of the high electronegativity of fluorine . 42. The fluorine -carbon bond is largely ionic producing a strong dipole. 43. Fluorine compounds typically have a fast NMR hydrogen-1 NMR spectra.44. Fluorine -containing agrichemicals are measurable in farmland runoff and nearby rivers.45. Several compounds made from elemental fluorine serve the electronics industry. 46. These include iodine, fluorine , cyanide, thiocyanate, and isocyanate. 47. Pentafluorosulfanylamine reacts with fluorine gas to yield difluoroamino sulfur pentafluoride: 48. Water burns in fluorine , suggesting it must contain some chemical energy. 49. Most chemists had believed that chemical separation of elemental fluorine was probably impossible. 50. Addition of fluorine lowers the dielectric constant of glass.
