Final answer:
The electron geometry of PF₃ is trigonal pyramidal.
Step-by-step explanation:
The electron geometry of PF₃ is trigonal pyramidal. In PF₃, the central atom is phosphorus (P) surrounded by three fluorine atoms (F) in a trigonal planar arrangement. The fourth electron pair on phosphorus is not involved in bonding and therefore creates a lone pair, resulting in the pyramidal shape.