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What are anomalous properties of fluorine

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What are anomalous properties of fluorine
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Snigdha Das 7 years, 3 months ago

Anomalous behaviour of fluorine : Fluorine differs from rest of the elements of its family due to (i) its small size (ii) highest electronegativity, (iii) low bond dissociation energy and (iv) absence of d-orbitals in the valence shell. The main points of difference are :

j. Fluorine is most reactive of all the halogens due to lower value of F−F bond dissociation energy ( F2=158, Cl2=243 , bromine = 192 and Iodine = 151 kJ mol–1 ) .

iii. Being the most electronegative element, it shows only an oxidation state of -1 and does not show positive oxidation states due to absence of d-orbitals in its valence shell. Other halogens show positive oxidation states of +1, +3, +5 and +7.
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