Final answer:A halogen element can be represented by the symbols F for Fluorine, Cl for Chlorine, Br for Bromine, I for Iodine, or At for Astatine. These elements are known for their high reactivity and are located in Group 17 of the periodic table.Explanation:The symbol for an element that is a halogen can be any of the following: Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), or Astatine (At). Halogens are Group 17 elements on the periodic table, known for their high reactivity and tendency to form salts when they react with metals.This unique property originates from their electronic configuration, which makes them one electron short of a full valence shell, leading to their eagerness to participate in chemical reactions to achieve stability....

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