Step 1: Identify bonding and lone pairs on the central atom In \( \text{SO}_3 \), sulfur is the central atom, bonded to three oxygen atoms without any lone pairs. Sulfur, with 6 valence electrons, and each oxygen, contributing 2 electrons, result in sulfur forming three double bonds with oxygen atoms.Step 2: Determine the molecular geometry With three electron density regions (three bonding pairs) and no lone pairs on the central sulfur atom, the molecular geometry is trigonal planar.Answer: Consequently, the molecular geometry of \( \text{SO}_3 \) is trigonal planar, corresponding to option (2).