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Summary AQA A level chemistry group 7 full revision notes
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A helpful and comprehensive set of revision notes covering the entire group 7 unit of AQA A level chemistry
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GroupHALOENS,
7 102 (HEMICAL REACTIONS
At com tempe otwe
Some of {luornes
fluorines a pale yelow gas proper ties awe due to the
chlome s green gas
bcomne is a ced-brown Lquid unexpeeiedly weak E-f bond
10dineIS a blak sold Lreputsion between non
burding electrons close
together
Atomic radus increasesi down the
each element has an ext fuledgoup
L’ oute shell elecdon level
turtaer fom nudeus
Electoneaatwaty decreasesi
3 share electuns aet down the 4roup
fucther tromnudeus - nveased shielding
those tactos more
umportaat than inceasing nudear chacge
Melting ond boboing points ineease
douwn the
morp elersOns so
stronger Ven de waas torces between
moleues. ey. chlone mort vatatile than iodne
Halcaens usualy gaun eletrons to became l 10ns. Htalogens are
Oxidising agent and so are reducec The
halocens inueases the
group
oxid1sung ability ot the
Displocement redions - the haide in the metal hadide wil be
by a mnore reactive haogen dsplaced
2 NaBr Br + 2NaC caq
hlor1ne s actny OxIdising agent
Chlcrne unt be investigated aqueous soutiQn because t
reacts with wter
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