Symbol F Atomic radius: pm 71 Fusion: kJ/Mole 0.51
Name Fluorine Ionic radius: pm (-1)133 Boiling point: °C -188
Atomic number 9 Electron affinity 3.40 Melting point: °C -220tp
Atomic weight 19.00 1st  ion potential 17.42 Specific Heat Cap: J/(g K) 0.82
Classification Non-metal Natural form Gas(F2) Thermal Cond: W/(cm K) <0.001
Configuration 1s22s2p5 Crystal structure - Electrical Cond -
Oxidation states -1 Density 1.70 Abundance: mg/kg-crust 585
Electronegativity 3.98 Vaporization: kJ/Mole 6.62    
The French chemist, Henri Moissan, first isolated fluorine in 1886 by electrolysis.  Nearly three-fourths of a century earlier André-Marie Ampère had suggested this method and named the predicted gas fluorine.     Uses - refrigerants, fluorocarbons, tooth decay prevention, toothpaste