Describe the arrangement and movement of particles in the three common states of matter: solid, liquid, and gas. How do these differences account for their characteristic properties?
BiologyClass 9CBSEAnswered 12 May 2026
Answer
In solids, particles are tightly packed in fixed positions, vibrating about their mean positions, giving solids a definite shape and volume. In liquids, particles are less tightly packed and can slide past each other, allowing liquids to take the shape of their container but maintain a definite volume.
In gases, particles are far apart, move randomly and rapidly, and have negligible intermolecular forces, leading to no definite shape or volume and high compressibility.
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