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→About Fluorine
: [[Fluorine]] kills [[bacteria]].
: [[Fluorine]] is a yellow coloured [[gas]] at [[STP|standard temperature and pressure]].
: An [[atom]] of [[Fluorine]] has only 2 is missing one [[electron]]s in its from having a full [[Outer Shell|outer shell]].
: [[Fluorine]] [[ion]]s gain 1 [[electron]] to get a full [[Outer Shell|outer shell]] and become [[Negative Charged|negatively charged]].
===Testing For Fluorine===
#Collect the [[gas]] in a [[Test Tube|test tube]].
#Place a piece of [[Litmus Paper|litmus paper]] over the mouth of the [[Test Tube|test tube]].
#If the [[Litmus Paper|litmus paper]] is [[bleach]]ed white then the [[gas]] is [[Fluorine]] or [[Chlorine]].