Which of the following is true about halogens? Group of answer choices

they have seven valence electrons

they have two valence electrons

they have one valence electron

they have eight valence electrons

Answer:they have one valence electron

Explanation:halogens are in group seven of the periodi table and they have seven electrons in their outermost shell thus need one electron to complete their octet condition. Thus goes into combination to accept one electrons from another element and that is their combining power which is their valency.