Q:

How many electrons are there in a sulfide ion?

A:

Quick Answer

Sulfide contains 18 electrons. It is a negatively charged ion of sulphur, and its charge comes from having two more electrons than common sulphur atoms.

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Full Answer

Ions are formed when an atom of an element gains or loses electrons, creating a mismatch between the number of electrons and the number of protons. Since electrons carry a negative charge, having more electrons than usual gives an atom an overall negative charge. Sulfide's charge makes it a strong base, as it can easily recombine with hydrogen to take in a proton and balance its electronegativity. Bases in general are molecules that easily donate electrons, and sulfide has two to offer, making it rather reactive.

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