

- The element fluorine is a greenish yellow gas. This a simulant, showing how fluorine appears (though the actual gas would be less intensely colored in small volumes). The real element would corrode even borosilicate glass.Original author unknown, Creative Commons License (Wikipedia)

- This diagram shows the electron shell of a fluorine atom.Greg Robson, Creative Commons License

- Pure fluorine is a corrosive pale yellowish brown gas.RTC, wikipedia.org