Question

Why does fluorine form only hypofluorous acid 2?

Answer 1

Flourine does not form oxoacid because of its high electronegativity and large interionic repulsion but sometimes it actually does form. It's called HYPOFLUOROUS ACID. Beyond that, fluorine cannot expand its octet, and formal charges dictate it can only have 1 single bond. This limits the number of oxygens it can bond with to 1. This may become more apparent as you try to draw Lewis structures for HFO2 or HFO3.