9.2 VSEPR theory of atoms of lone bonded to pairs on Arrangement of Molecular Class central atom central atom electron pairs Geometry AB3 3 0 trigonal trigonal planar planar Boron Trifluoride BF3 120° \ PlanarClass # of atoms bonded to central atom # of lone pairs on central atom Arrangement of electron pairs Molecular Geometry AB3 3 0 trigonal planar trigonal planar Boron Trifluoride BF3 9.2 VSEPR theory