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How many electrons, protons and neutrons does chlorine have? A: The chemical element chlorine has 17 electrons, 17 protons and 18 neutrons. An atom, which is the fundamental unit of an element, contains an equal number ... Full Answer >
Along with fluorine, bromine, iodine, and astatine, chlorine is a member of the halogen series that forms the group 17 (formerly VII, VIIA, or VIIB) of the periodic table. Chlorine combines with almost all other elements to produce compounds that are usually called chlorides.