Explain. Why fluorine exhibits an oxidation state of -1 only, while other elements of the family exhibit oxidation state of -1 +1, +3, +5 and +7.

Explanation

Due to its highest electronegativity, flourine exihibits an oxidation state (-1) and does not show any positive oxidation state. It does not exhibit higher oxidation states (+ ve or -ve) due to the absence of vacant d-orbitals. While, other members, shows oxidation state of -1, +1, +3, +5 and +7.