Boron is a group IIIA element. Open the molecular model for boron trifluoride from the 3D Molecular Models section of the book's website. Near the boron atom, above and below the plane of the atoms in BF3, are two relatively large lobes. Considering the position of boron in the periodic table and the three-dimensional and electronic structure of BF3, what type of orbital does this lobe represent? Is it a hybridized orbital or not?