Question

open-ended question
why are the halogens the most reactive non - metals?
type your answer here

Explanation:

Halogens have 7 valence electrons. They need just 1 more electron to achieve a stable octet (except for helium which has a duplet). Their high electronegativity (ability to attract electrons) makes them highly reactive as they readily gain that one electron from other atoms. For example, fluorine is the most electronegative element.

Answer:

Halogens are the most reactive non - metals because they have 7 valence electrons and a high electronegativity, readily gaining one electron to achieve a stable electron configuration.