Help with Chem Dipoles?
Consider the AF3 molecules on the first figure. (Figure 1) Which of these will have a nonzero dipole moment?
Which of the AF4 molecules on the second figure will have a zero dipole moment? (Figure 2)
Figure 2 Link:
The Best answer for Help with Chem Dipoles?
Only ii and iii have nonzero dipole moments.
This is because they are asymmetric
Only iii has a zero dipole moment.
This is because it is symmetrical
Think of each F atom as a vector. If the vectors cancel and add to zero, the dipole moment is zero.