The correct answer is: They have 7 valence electrons.
Halogens belong to Group 17 of the periodic table, also known as the halogen group. They have seven valence electrons in their outermost energy level, which makes them highly reactive. Halogens are one electron away from achieving a stable octet (eight valence electrons), which is the most stable electron configuration. As a result, halogens readily react with other elements in order to gain that one missing electron and achieve a stable electron configuration. This high reactivity is due to their strong desire to gain an electron through bonding with other elements.
Why are halogens the most reactive nonmetal group?
They have 8 valence electrons.
They have 8 electrons.
They have 7 electrons.
They have 7 valence electrons.
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