Electron Domain Geometry Chart. Polarity does not apply to polyatomic ions 1 PF3. 5 4 3 2.
If all Xs are the same this will be a non-polar molecule. 1 2 3 0 1 2. An example of a molecule with this geometry is CH 2 CCH 2 which has two H 2 C-C bonds forming a 180-degree angle.
You can also differentiate the two by thinking of electron geometry.
1 2 3 0 1 2. Due to the non-equivalence of bonding and non-bonding electron pairs the bond angle deviates from the ideal 1095. 3 electron domains 0 lone pairs. If not all A-X bond are identically polar this will be a polar molecule.