The Lewis structure of S2- is represented by the capital letter “S” surrounded by eight dots, along with a “2-” superscript indicating the ion’s charge. The dots represent the total number of valence electrons in the outermost shell of the ion.
A Lewis structure, also known as a Lewis electron dot diagram, is a graphical representation of an atom’s valence electron count. These electrons determine the atomic’s chemical bonding characteristics.
For negatively charged atoms, such as the sulphide ion S2-, the normal number of valence electrons for a neutral sulphur atom, which is six, is raised by two, for a grand total of eight electrons. In the Lewis structure for the sulphide ion, the eight dots representing valence electrons are often positioned as two dots on the left, right, top, and bottom sides of the sulphur chemical symbol.