Triangular Planar polar or nonpolar

Question

Triangular Planar polar or nonpolar

Answer 1

Nice link

http://dbhs.wvusd.k12.ca.us/webdocs/Bond...

Answer 2

I believe the correct term is "trigonal" planar, but the molecule's polarity depends on which atoms are involved. Boron trifluoride (BF3) has this geometry, but is nonpolar because all the dipole moments from the Boron-Fluoride bonds cancel out. Formaldehyde (H2CO), however, is quite polar because carbon and oxygen differ significantly in electronegativity, while the hydrogen-carbon bonds are essentially nonpolar.

If all the atoms on the outside of the molecule are the same, the molecule will definitely be nonpolar. If they are not the same, it just depends on whether they differ significantly in electronegativity.

Answer 3

A molecule with trigonal planar molecular geometry might be polar, or it might not.  It all depends on what is attached to the central atom.  

If all three atoms attached the central atom are the same then the molecule is nonpolar.  But if they are different, as in CH2O, then the molecule will be quite polar.

You will need to actually specify a compound before you can determine if it is polar or not.