## polarity of shapes

Savannah Mance 4G
Posts: 107
Joined: Fri Aug 30, 2019 12:17 am

### polarity of shapes

Are molecules that are trigonal planar usually non polar?

Rodrigo2J
Posts: 102
Joined: Sat Jul 20, 2019 12:16 am

### Re: polarity of shapes

The molecule will be non polar as long as it doesn't have a net dipole moment. So as long as the three atoms around the central atom are the same then yes it should be non polar for a trigonal planar geometry.

Nawal Dandachi 1G
Posts: 102
Joined: Sat Sep 28, 2019 12:16 am

### Re: polarity of shapes

only if they are symmetric and all the atoms attached to the central atom are the same; however, if the atoms attached to the central atom are not the same, then it is polar.

sarahsalama2E
Posts: 164
Joined: Fri Aug 30, 2019 12:16 am

### Re: polarity of shapes

Also, remember that typically shapes that have lone pairs are usually always polar even if all the attached atoms are the same; however AX4E2, square planar, is an exception to that rule because it becomes nonpolar because the dipole moments cancel. You can see this if you draw the 3-D shape.