The solidity and texture of objects are fundamentally determined by their molecular structure and the electrostatic forces between atoms. Despite atoms being composed of over 99.999% empty space, these forces prevent direct contact, creating the perception of solidity. For instance, metals exhibit a rigid crystalline structure at room temperature, while water molecules demonstrate fluidity due to their ability to slide past one another. Understanding these principles is essential for grasping the physical properties of materials.
PREREQUISITESMaterial scientists, physicists, students of chemistry, and anyone interested in the fundamental properties of solids and liquids.