Halogens belong to which group?

• A. Group 7 elements
• B. Group 2 elements
• C. Group 0 elements
• D. Group 1 elements

Answer: (A)

Halogens are in the group with seven electrons in their outer shell. That single characteristic defines their place on the periodic table and explains why they’re highly reactive non‑metals that often gain one electron to complete their outer shell. In GCSE terminology this group is called Group seven. The other groups represent different families: Group 2 are the alkaline earth metals with two outer electrons, Group 0 are the noble gases with full outer shells, and Group 1 are the alkali metals with one outer electron. So the halogens belong to the group with seven outer electrons.