which of the following is the most polar?

1. I3-
2. XeF2
3. SCN-
4. O3
5. N2O

i know it's not I3- or SCN-.

which one would it be.

O3---ozone. this is definitely the right answer

It is O3- i just did it on my UT HW

DrBob222- it is not N20

o3

To determine the most polar molecule among the choices provided, we need to consider the polarity of the individual bonds within each molecule and the molecular geometry.

Let's analyze each option:
1. I3- (Triiodide ion) - This molecule has a linear molecular geometry, and the I-I bonds are relatively nonpolar due to the similar electronegativity of iodine. Thus, it is not the most polar.

2. XeF2 (Xenon difluoride) - This molecule has a linear molecular geometry, and the Xe-F bonds are polar due to the significant difference in electronegativity between xenon and fluorine. However, since the molecular geometry is linear, the polarities of the Xe-F bonds cancel each other out, making the molecule nonpolar.

3. SCN- (Thiocyanate ion) - This molecule has a linear molecular geometry, and the S-C and C-N bonds are polar due to the electronegativity difference between sulfur, carbon, and nitrogen. However, similar to XeF2, the linear geometry causes the polarities of the bonds to cancel each other out, resulting in a nonpolar molecule.

4. O3 (Ozone) - This molecule has a bent or V-shaped molecular geometry. The O-O bonds are nonpolar due to the same electronegativity of oxygen, but the bent geometry creates an uneven distribution of charge, resulting in a polar molecule.

5. N2O (Dinitrogen monoxide) - This molecule has a linear molecular geometry, and the N-N bond is nonpolar since nitrogen has the same electronegativity. Therefore, N2O is not the most polar molecule.

Based on the analysis, the most polar molecule among the options given is O3 (ozone).

N2O; XeF2 and O3 have equal pull.

It appears SCN- and N2O are very close but N2O has the edge.