Explain how the electron pair repulsion theory can be used to deduce the shape of, and the bond angle in, PF3 .

Number of electrons from P= 5 e , Number of electrons from 3F = 3 e , Total number of electrons around P = 8 e Therefore there is a total number of 4 electron pairs surrounding P. three of which are bond pairs and one is a lone pair Lone pairs repel more than bond pairs. shape of PF3 is tetrahedral with bond angle of 109.5°