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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 >
eg. chlorine has 17 electrons, so it order is 2,8,7 Cl has 1 less electron to make the chlorine atom stable, so it charge is Cl-. it has a negative charge. Sodium has 11 electrons, so it order is 2,8,1 Na has 1 extra electron that it wants to get rid of to make Na stable and its charge is Na+. it has positive charge. How many electrons does gallium give up when it becomes an ion?