S2− Draw the particle by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons and nonbonding electrons. Show the charge of the atom.

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Explanation:

The S^2- ion is formed when sulphur atom accepts two electrons. Sulphur normally has six electrons in its outermost shell, it can however accept two more electrons to complete its octet and form the sulphide  (S^2-) ion.

The Lewis structure of the sulphide ion is shown in the image attached to this answer.

Image credit: socratic

the dependant variable is spilled water

the independent is the heat