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: [[Chlorine]] kills [[bacteria]].
: [[Chlorine]] is a pale green coloured [[gas]] at [[STP|standard temperature and pressure]].
: An [[atom]] of [[Chlorine]] has only 2 is missing one [[electron]]s in its from having a full [[Outer Shell|outer shell]].
: [[Chlorine]] [[ion]]s gain 1 [[electron]] to get a full [[Outer Shell|outer shell]] and become [[Negative Charged|negatively charged]].
====Testing For Chlorine====