A-level Chemistry/OCR (Salters)/Halogens

Gallery Diatomic halogen molecules halogen molecule structure model d(X−X) / pm(gas phase) d(X−X) / pm(solid phase)fluorineF245px45px143 149chlorine Cl270px63px199198bromineBr280px72px228227iodineI270px style="text-align:center"84px266272 Fluorine 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. Chlorine Bromine Iodine Astatine