7A, or the older 17 block. Fluorine, chlorine, bromine and iodine.
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You might also be asking what larger classification the halogens belong to: nonmetals. Please see the link.
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Halogens belong to the 17th group of the Periodic Table, also known as Group 17 or Group VIIA. They include elements such as fluorine, chlorine, bromine, iodine, and astatine.
Diatomic elements belong to the nonmetals family in the periodic table. They include elements like hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine.
Another name for the group 17 elements is the halogens.
Chlorine and iodine belong to the halogen family on the periodic table. Halogens are highly reactive elements that readily form compounds with other elements.
Halogens Apex ;)
Halogens are nonmetals. They belong to group 17 of the periodic table and include elements such as fluorine, chlorine, bromine, iodine, and astatine. They typically exist in the form of diatomic molecules with highly reactive properties.