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[[Fluorine]] is a [[Group 7]] [[element]], on the [[Periodic Table]], with an [[Atomic Number|atomic number]] of 9.
===About Fluorine===
====Molecular Structure===
: [[Fluorine]] has the [[Chemical Formula|chemical formula]] [[Fluorine| F<sub>2</sub>]].
====Atomic Structure====
: [[Fluorine]] as 9 [[proton]]s and 10 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Atomic Number]] of 9 and an [[Relative Atomic Mass|atomic mass]] of 19.
: An [[atom]] of [[Fluorine]] is missing one [[electron]] from having a full [[Outer Shell|outer shell]].
: '''Fluoride''' [[ion]]s gain 1 [[electron]] to get a full [[Outer Shell|outer shell]] and become [[Negative Charged|negatively charged]].
====Properties====
: [[Fluorine]] is the most [[Reactivity|reactive]] [[Halogen]].
: [[Fluorine]] [[Chemical Reaction|reacts]] strongly with [[Hydrogen]] to produce [[Hydrogen Fluoride]] which [[dissolve]]s in [[water]] to produce [[Hydrofluoric Acid]].
: [[Fluorine]] kills [[bacteria]].
: [[Fluorine]] is a yellow coloured [[gas]] at [[STP|room temperature]].
==Key Stage 4==
===Meaning===
[[Fluorine]] is a [[Group 2]] [[element]], on the [[Periodic Table]], with 9 [[proton]]s in the [[Atomic Nucleus|nucleus]].
===About Fluorine===
====Molecular Structure====
: [[Fluorine]] has the [[Chemical Formula|chemical formula]] [[Fluorine|F<sub>2</sub>]].
====Atomic Structure====
: The most [[Stable Isotope|stable isotope]] of [[Fluorine]] has 10 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 19.
: An [[atom]] of [[Fluorine]] is missing one [[electron]] from having a full [[Outer Shell|outer shell]].
: '''Fluoride''' [[ion]]s gain 1 [[electron]] to get a full [[Outer Shell|outer shell]] and become [[Negative Charged|negatively charged]].
====Properties====
: [[Fluorine]] is the most [[Reactivity|reactive]] [[Halogen]].
: [[Fluorine]] [[Chemical Reaction|reacts]] strongly with [[Hydrogen]] to produce [[Hydrogen Fluoride]] which [[dissolve]]s in [[water]] to produce [[Hydrofluoric Acid]].
: [[Fluorine]] kills [[bacteria]].
: [[Fluorine]] is a yellow coloured [[gas]] at [[STP|standard temperature and pressure]].
====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]].