🤓 Based on our data, we think this question is relevant for Professor Turnpenny's class at BU.
To write the Lewis symbol for any Main-Group element:
1) Remember that Group Number equals Valence Electron Number.
2) Place one dot at a time on the four sides (top, right, bottom, left) of the element symbol.
3) Keep adding dots, pairing them up until you have reach the number of total valence electrons for that element.
Which Lewis electron-dot diagram is correct for a S2− ion?