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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 >
this is because the total number of electrons for chlorine is now 18. protons and electrons have the same atomi â¦ c number, but when a chlorine ion forms it has one extra electron compared to the number of protons therefore giving it a negative charge of 1. Answered.