What will pass through the lipid bilayer the fastest? List from fastest to slowest.

I'd say on the ease of how well each should get through:

1) Lipid
2) Glucose
3) Nitrogen
4) Calcium ion

Lipid bilayer only allows things that an dissolve in it to pass through with ease. This means non polar chemicals that dissolve in fats travel through with ease. Lipids do with great ease (they are the same thing!). Glucose can do so with some ease because of all the carbon atoms. Nitrogen probably would very poorly if at all, and im not sure when it would be a relevant chemical to cross a bilayer. Calcium ions won't transport across virtually at all, unless there is a massive concentration gradient, in which case it would still be small. They usually need transporter proteins to help with that. If you take into account those too, then the answers i gave above would likely be different.