In general, how do the densities of a material in solid, liquid, and has phases compare? Name a common exception to the rule.

Yes

Explanation:

The density of solids, liquids, and gaseous objects have various phases upon conversion to every phase they tend to form different chemical and physical properties as the kinetic energy in the material of gases free from sticking to each other and similarly for the liquid and solids. Any exceptions to this would be in noncompact material like snow flakes. As their volume is made up of a void of fractions.