Which group contains halogens?

Halogens are found in Group 17 of the periodic table. This group includes elements such as fluorine, chlorine, bromine, iodine, and astatine. Halogens are characterized by their high reactivity, particularly with alkali metals from Group 1, to form salts. Their position in the periodic table is significant; they are one column to the left of the noble gases in Group 18, which are known for their lack of reactivity. Thus, identifying Group 17 as the correct answer is based on its definitive classification of elements known as halogens, distinguished by their valence electron configuration that leads to their distinctive chemical properties.