Chemistry - Complete Pblock- Question with Solution | TestHub

Here fluorine atom has no d-orbital in its valence shell, hence it cannot expand its octect and exhibit variable oxidation states, Being the most electronegative, it exhibits only – 1 oxidation state. Rest other here can do it as have d-orbital & can expand their octet states.
Eg.$\underset{+3}{\mathrm{B}\mathrm{r}{\mathrm{F}}_3},\underset{+7}{\mathrm{I}{\mathrm{F}}_7}$