Do particles of a substance in different states have different shapes and sizes?

Yes, particles of a substance in different states (solid, liquid, gas) have different shapes and sizes. In solids, particles are closely packed in a fixed arrangement, giving them a definite shape. In liquids, particles are still close but can move past each other, allowing the liquid to take the shape of its container. In gases, particles are far apart and move freely, resulting in no fixed shape or size.