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A sulfide ion (S2-) has a charge of -2 because sulfur typically forms two covalent bonds with other elements in ionic compounds. Sulfur is in Group 16 of the Periodic Table, also known as the oxygen family, which means it has six valence electrons. By gaining two electrons to achieve a stable electron configuration, sulfur fills its valence shell and attains a full octet, resulting in a -2 charge.

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9mo ago

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