Final answer:
The electron geometries for SCl2, CHF3, PBr3, and CS2 are described. The SCl2 electron pair geometry is trigonal planar. The CHF3 electron pair geometry is also tetrahedral. The PBr3 electron pair geometry is also trigonal pyramidal. The CS2 electron pair geometry is also linear.
Step-by-step explanation:
For SCl2, we have two bonded atoms and two lone pairs around the central sulfur atom. This gives us a bent or V-shaped molecular geometry. The electron pair geometry is trigonal planar.
For CHF3, we have one bonded atom and three lone pairs around the central carbon atom. This gives us a tetrahedral molecular geometry. The electron pair geometry is also tetrahedral.
For PBr3, we have three bonded atoms and no lone pairs around the central phosphorus atom. This gives us a trigonal pyramidal molecular geometry. The electron pair geometry is also trigonal pyramidal.
For CS2, we have two bonded atoms and no lone pairs around the central carbon atom. This gives us a linear molecular geometry. The electron pair geometry is also linear.