True, PF3 (phosphorus trifluoride) is a polar molecule.
Explanation: The polarity of a molecule depends on the difference in electronegativity between the atoms and the molecular geometry. In PF3, phosphorus (P) and fluorine (F) have different electronegativities, with fluorine being more electronegative than phosphorus. This difference creates a dipole moment where the fluorine atoms pull electron density towards themselves, resulting in a partial negative charge on the fluorine atoms and a partial positive charge on the phosphorus atom.
Additionally, PF3 has a trigonal pyramidal molecular geometry due to the lone pair of electrons on the phosphorus atom. This geometry causes the dipole moments to not cancel out, making the molecule polar. Therefore, PF3 is indeed a polar molecule.