Draw the Lewis (electron dot) structures of PF₃ and PF₅ and use the VSEPR theory to deduce the molecular geometry of each species including bond angles.

Predict whether the molecules PF₃ and PF₅ are polar or non-polar.

State the type of hybridization shown by the phosphorus atom in PF₃.

Accept any combination of dots, crosses and lines.

Penalize missing lone pairs once only.

Do not apply ECF for molecular geometry.

Accept values in the range 95–109 for PF₃.

PF₃ polar AND PF₅ non-polar

Apply ECF from part (a) molecular geometry.

sp³