Solids have definite shapes and volumes because their atoms and molecules are held together firmly by the strong inter-molecular forces. At low temperatures, the kinetic energy in the solid is usually not enough to overcome these intermolecular forces, so the solid remains in the same state.Know More
The molecules of solids are held together so tightly that their movement is limited, and this is what gives them shape and volume. Their ability to resist compression is another property that makes solids retain their shape and volume. In the solid state, substances have high densities, and their diffusion rates are far lower than those of liquids.
Generally, solids are classified into two categories depending on how the constituent molecules and atoms are arranged in the solid. These are crystalline solids and amorphous solids.
In crystalline solids, the molecules and the atoms are organized into definite shapes so that when the solid is shattered, the orderly arrangement of the ions, molecules or atoms results in straight edges. In amorphous solids, the molecules and the atoms have no definite arrangement, and the solid consists of disorganized and tangled strings of molecules. When these solids are shuttered, the edges appear as curved because there is no definite internal structure. A perfect example of an amorphous solid is glass.Learn More
By definition, solids have a fixed volume. The atoms or molecules composing a solid are closely packed together and are stabilized by interatomic or intermolecular forces, making them resistant to further compression.Full Answer >
Gases and plasmas have neither definite shapes nor definite volumes. They both expand to fill available space, and can be reshaped by their containers. Liquids have definite volume, while solids have both definite shape and definite volume.Full Answer >
A gas does not have a definite volume. By its definition, a gas is a fluid state of matter that fits to the shape and volume of its container.Full Answer >
Convection does not occur in solids because the particles within are too tightly packed to facilitate the process. Convection requires actual movement between the particles within a substance in order to transfer heat which is only possible in a fluid state of matter such as liquid or gas.Full Answer >