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How many protons and electrons does an ion of S2- have?
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How many protons and electrons does an ion of S2- have?

User Johnny Bones
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Thus, each atom or ion of sulfur must contain 16 protons. We are told that the ion also has 16 neutrons, meaning the mass number of the ion is 16 + 16 = 32. Because the ion has 16 protons and 18 electrons, its net charge is 2–.
User AlexFZ
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