Would the following structures be polar or nonpolar? (Not applicable if the structure is an ion. Pick "ionic" in that case).

Question

Would the following structures be polar or nonpolar? (Not applicable if the structure is an ion. Pick "ionic" in that case). 
SO2 
N2O 
N3−

Johannie · Accepted Answer

SO2 polar N2O polar N3- non polar ?

DBob222 · Answer

Is the idea here for you to know the Lewis electron dot structure?
Draw the Lewis structure, then determine the shape of the molecule.
In order for a molecule to be polar the following two criteria must be satisfied.
1. There must be a difference in electronegativity between the central atom and one of the other atoms, AND
2. The molecule must not be symmetrical in three dimensions.

DBob222 · Answer

Those look ok to me. N2O is linear but polar.

Johannie · Answer

it tells me that it is incorrect..

bobpursley · Answer

N3- is an ion.

Johannie · Answer

so N20 is polar SO2 is polar and N3- is ionic ?

DBob222 · Answer

I should have read the instructions as bob Pursley did. Would the following structures be polar or nonpolar? (Not applicable if the structure is an ion. Pick "ionic" in that case).