A. Most solids have low densities B. Most gases are ionic compound C. Solids, like liquids and gases, do not have fixed shapes and fixed volumes D. gases do not have their own shape but rather expand to fill the shapes of their containers uniformly.
Correct Answer: A
Explanation
Most solids have low density; most gases are covalent (not ionic). Most solids, unlike liquids and gases have fixed shape and volume; when gas expands to fill their containers, they do so randomly (not uniformly).
