A little something about the element
FLUORINE

First, let's make sure we can spell it right!
There is no "flour" in "fluorine"!
 
It doesn't even sound like "flower."
It sounds like "floor - een". 		F would really really like to have just one more electron. When F gets one more electron, it has a (-1) charge (and that makes it an ion - an anion, to be exact). (Learn more about ions here.) The symbol changes to F- and its name changes to fluoride. Sodium fluoride is added to toothpaste (and often drinking water) to help prevent tooth decay.
The symbol for fluorine is F. (That's even easier to spell!) F
If all four H atoms in the monomer ethylene are replaced with four F atoms, the new monomer is tetrafluoroethylene. The monomer tetrafluoroethylene is:
structure of tetrafluoroethylene
When this is made into a polymer, it's polytetrafluoroethylene, or Teflon®.
structure of part of a PTFE chain
The bond between a fluorine atom and a carbon atom is extra strong - even stronger than a bond between two carbons. It's so stable that nothing will react with it, even when it gets as hot as a frying pan!
  Because PTFE is non-stick, you can fry things without grease or butter. This means less fat and cholesterol, for a healthier heart.