Question

in the following descriptions the particles are atoms, molecules, or ions. to which sample above does each description best apply? the particles vibrate about fixed positions. the sample fills its container. helium gas milk liquid sugar solid

Explanation:

In solids, particles vibrate about fixed positions due to strong intermolecular forces. In liquids, particles are more free - flowing than solids but still have some intermolecular attraction. Gases have particles that move freely to fill their container as they have weak intermolecular forces. Helium is a gas, so its particles fill the container. Milk is a liquid, and its particles do not have fixed positions. Sugar is a solid, and its particles vibrate about fixed positions.

Answer:

Helium: The sample fills its container.
Milk: Neither of the given descriptions.
Sugar: The particles vibrate about fixed positions.