Verified Answer :

PF3 is phosphorustrifluoride with p in the center and three f bonding with it.PF5 is phosphoruspentafluoride with p in the middle and 5 f linking to bond

Explanation:

The phosphorus trifluoride (\(PF_3\)) has a piramidal geometry as can be seen in the First figure with the three F bonded to the P.

The phosphorus pentafluoride (\(PF_5\)) has a bipiramidal geometry as can be seen in the Second figure with all the F bonded to the P.

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