Can you please explain the structure of the element "Flourine"?
The element F has an atomic number of 9 which means it has 9 protons in the nucleus and 9 electrons in the outside shells. The atomic mass is 18.9984. There are two electrons in the first shell and seven in the second shell. You can find much more information about F at the following link.
http://www.webelements.com/fluorine/