* Sulfur's Position on the Periodic Table: Sulfur (S) is in Group 16 (also called VIA) of the periodic table. Elements in this group tend to gain two electrons to achieve a stable octet (8 electrons) in their outermost shell.

* Ionic Charge: To gain these two electrons, sulfur becomes a negatively charged ion. The charge is represented as a superscript after the element symbol.

* Sulfur Ion: Therefore, the charge of a sulfur ion is 2-, written as S²⁻.