CBSE Class 12 Chemistry Notes: The p Block Elements – Halogens Family

CHEMICAL PROPERTIES IN HALOGEN
Among all the halogens fluorine is the most reactive and reactivity decreases down the group. The high reactivity of fluorine is due to high electronegativity and low bond dissociation energy among the group.

The compounds of oxygen with fluorine are called as fluorides because fluorine is more electro negative than oxygen. Most of these compounds are endothermic and unstable and are likely to explode resulting in the formation of more stable products.
All the oxides are powerful oxidizing agents and decompose explosively when they are given mechanical shock or heat.

The structures of some molecules is as follows

5. Oxyacids

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