Question

Write any ‘four points’ of difference between fluorine and other halogens.

Answer 1

	Fluorine	Other halogens
Reactivity	Fluorine is much more reactive due to its small atomic size, high nuclear  charge and low F - F bond dissociation energy	Other halogens are less reactive than fluorine.
Hydrogen bonding	Hydrogen bonding is present in hydrides of fluorine.	Hydrogen bonding is not present in hydrides of other halogens.
Oxidation state	Due to the highest electronegativity and absence of the vacant d-orbitals in the valence shell, fluorine shows only -1 oxidation state in all its compounds.	Other halogens show -1 , + 1, + 3, +5 and + 7 oxidation states.
Polyhalide ions	Due to absence of vacant d-orbitals in the valence shell, fluorine does not form any polyhalide ion.	Other halogens form polyhalide ions such as `"""I"_3^-, """Br"_3^-, """Cl"_3^-`.