A-level Chemistry/OCR (Salters)/Halogens

< A-level Chemistry‎ | OCR (Salters)

Contents

GalleryEdit

Diatomic halogen moleculesEdit

halogen molecule structure model d(X−X) / pm
(gas phase)
d(X−X) / pm
(solid phase)
fluorine
F2
 
 
143
149
chlorine
Cl2
 
 
199
198
bromine
Br2
 
 
228
227
iodine
I2
 
 
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