What would the electron shells of an insulator look like and how would that affect the ability of the material

to conduct electricity?

What would the electron shells of an insulator look like and how would that affect the ability of the material
We have not been studying our text as well as we should? Your question should have been covered already in any basic explanation of conductors versus insulators as regards the basic principles of electricity. I think you need to go and read the information in your assignment to get this question answered. I will say this, conductors have electrons to move, and insulators do not. Now go read the assignment to know why.