What state symbol represents a solid?

The state symbol that represents a solid is "s". In chemistry, state symbols are used to indicate the physical state of substances in equations and reactions. The "s" specifically denotes a solid state, which is characterized by a defined shape and volume, where the particles are closely packed together and vibrate in fixed positions.

Understanding the other state symbols provides further context: "l" stands for a liquid state, where particles are close but can move past one another, allowing the liquid to take the shape of its container; "g" indicates a gas state, where particles are far apart and move freely; and "aq" represents an aqueous solution, where a substance is dissolved in water, highlighting a mixture rather than a pure solid state.