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Created page with "==Key Stage 4== ===Meaning=== Group 7 elements, also known as '''Halogens''' on the Periodic Table are the elements which have 7 electrons in their Outer..."
==Key Stage 4==
===Meaning===
[[Group 7]] [[element]]s, also known as '''Halogens''' on the [[Periodic Table]] are the [[element]]s which have 7 [[electron]]s in their [[Outer Shell|outer shell]].
{| class="wikitable"
|-
|[[File:PeriodicTableGroups.png|center|600px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Group 7]] [[element]]s are shown in green at the right of the [[Periodic Table]].
|}
===About the Halogens===
: The '''Halogens''' have similar [[Chemical Property|chemical properties]] because they all have 7 [[electron]]s on their [[Outer Shell|outer shell]].
: '''Halogens''' all produce [[ion]]s with a -1 [[Relative Atomic Charge|relative charge]] because they gain an [[electron]] in [[Chemical Reaction|chemical reactions]].
The '''Halogens''' in order from most [[reactivity|reactive]] to least [[reactivity|reactive]] are:
*[[Fluorine]] (F)
*[[Chlorine]] (Cl)
*[[Bromine]] (Br)
*[[Iodine]] (I)
*[[Astatine]] (At)
===Chemical Properties===
: The [[reactivity]] of '''Halogens''' decreases as you go down the [[Periodic Table]].
: '''Halogens''' all [[Chemical Reaction|react]] strongly as [[Bleaching Agent|bleaching agents]].
: '''Halogens''' all produce [[acid]]s when combined with [[Hydrogen]].
===Physical Properties===
The [[Physical Property|physical properties]] of '''Halogens''' changes significantly as you go down the [[Periodic Table]]:
*[[Fluorine]] - A yellow [[gas]] at [[Room Temperature|room temperature]].
*[[Chlorine]] - A green [[gas]] at [[Room Temperature|room temperature]].
*[[Bromine]] - A brown [[liquid]] at [[Room Temperature|room temperature]].
*[[Iodine]] - A purple [[solid]] at [[Room Temperature|room temperature]].
*[[Astatine]] -A dark purple [[solid]] at [[Room Temperature|room temperature]].
: The [[density]], [[Melting Point|melting point]] and [[Boiling Point|boiling point]] all increase as you go down the [[Periodic Table]].
===Meaning===
[[Group 7]] [[element]]s, also known as '''Halogens''' on the [[Periodic Table]] are the [[element]]s which have 7 [[electron]]s in their [[Outer Shell|outer shell]].
{| class="wikitable"
|-
|[[File:PeriodicTableGroups.png|center|600px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Group 7]] [[element]]s are shown in green at the right of the [[Periodic Table]].
|}
===About the Halogens===
: The '''Halogens''' have similar [[Chemical Property|chemical properties]] because they all have 7 [[electron]]s on their [[Outer Shell|outer shell]].
: '''Halogens''' all produce [[ion]]s with a -1 [[Relative Atomic Charge|relative charge]] because they gain an [[electron]] in [[Chemical Reaction|chemical reactions]].
The '''Halogens''' in order from most [[reactivity|reactive]] to least [[reactivity|reactive]] are:
*[[Fluorine]] (F)
*[[Chlorine]] (Cl)
*[[Bromine]] (Br)
*[[Iodine]] (I)
*[[Astatine]] (At)
===Chemical Properties===
: The [[reactivity]] of '''Halogens''' decreases as you go down the [[Periodic Table]].
: '''Halogens''' all [[Chemical Reaction|react]] strongly as [[Bleaching Agent|bleaching agents]].
: '''Halogens''' all produce [[acid]]s when combined with [[Hydrogen]].
===Physical Properties===
The [[Physical Property|physical properties]] of '''Halogens''' changes significantly as you go down the [[Periodic Table]]:
*[[Fluorine]] - A yellow [[gas]] at [[Room Temperature|room temperature]].
*[[Chlorine]] - A green [[gas]] at [[Room Temperature|room temperature]].
*[[Bromine]] - A brown [[liquid]] at [[Room Temperature|room temperature]].
*[[Iodine]] - A purple [[solid]] at [[Room Temperature|room temperature]].
*[[Astatine]] -A dark purple [[solid]] at [[Room Temperature|room temperature]].
: The [[density]], [[Melting Point|melting point]] and [[Boiling Point|boiling point]] all increase as you go down the [[Periodic Table]].