Question

How many bond pairs and lone pairs does PF3 have?

Answer 1

the lone pair of PF3 have 3 bonds

Answer 2

The number of valence electrons is 5 + 3×7 = 26. If you draw a trial structure in which P is the central atom and every atom has an octet, you will have used 26 electrons. This is the correct number of electrons, so the trial structure is the correct structure. The P atom in PF3

And has one lone pair of electrons.