Question: how many protons and electrons are there in the sulfide ion?
Answer: Often, a sulfur particle is found to contain 16 protons and 18 electrons. This particle is a sulfur ion. Although the 16 protons cancel the charge of 16 electrons, the two un-cancelled electrons leave the ion with an overall charge of ─2. The symbol for this particle is S2─, and it is called a sulfide ion.