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: [[Fluorine]] is a yellow coloured [[gas]] at [[STP|room temperature]].
: An [[atom]] of [[Fluorine]] is missing one [[electron]] from having a full [[Outer Shell|outer shell]].
: [[Fluorine]] '''Fluoride''' [[ion]]s gain 1 [[electron]] to get a full [[Outer Shell|outer shell]] and become [[Negative Charged|negatively charged]].
==Key Stage 4==
===Meaning===
: [[Fluorine]] is a yellow coloured [[gas]] at [[STP|standard temperature and pressure]].
: An [[atom]] of [[Fluorine]] is missing one [[electron]] from having a full [[Outer Shell|outer shell]].
: [[Fluorine]] '''Fluoride''' [[ion]]s gain 1 [[electron]] to get a full [[Outer Shell|outer shell]] and become [[Negative Charged|negatively charged]].
===Testing For Fluorine===