A-level Chemistry/OCR (Salters)/Halogens

GalleryEdit

Diatomic halogen moleculesEdit

halogen molecule structure model d(X−X) / pm
(gas phase)
d(X−X) / pm
(solid phase)
fluorine
F2
Difluorine-2D-dimensions.png
Fluorine-3D-vdW.png
143
149
chlorine
Cl2
Dichlorine-2D-dimensions.png
Chlorine-3D-vdW.png
199
198
bromine
Br2
Dibromine-2D-dimensions.png
Bromine-3D-vdW.png
228
227
iodine
I2
Diiodine-2D-dimensions.png
Iodine-3D-vdW.png
266
272

FluorineEdit

Fluorine is the most electronegative element in the periodic table, and is also the most reactive. Flourine is a special case as Fluorine has anomalous properties due to its small size. It has a lower electron affinity than Chlorine due to electron repulsions in the overcrowded outer shell. However, it is a stronger oxidising agent than Chlorine due to its unusually low bond energy. This is due to the repulsions between outer electrons in the F2 molecule.

ChlorineEdit

BromineEdit

IodineEdit

AstatineEdit

Last modified on 28 November 2012, at 17:43