What Is a Solid?

Solids have the ability to store and release thermal energy. Atoms of solids vibrate at fixed mean positions within their lattice, forming a kinetic theory of solids. The motion of atoms occurs at the atomic level, but this movement is intangible and cannot be observed without the use of specialized equipment. Solids have various thermal properties, including their thermal conductivity and their specific heat capacity. If you are a student of solids, you will probably be interested in this subject.

Crystalline solids

The term crystal is an apt definition for solid materials that are characterized by a highly ordered microscopic structure known as crystal lattice. As the name implies, crystals are composed of tiny, crystalline elements. What’s more, they have extremely high density. Crystals are the most common types of solid materials, and they are found in almost every natural product. Let’s take a closer look at these objects.

Amorphous solids

Amorphous solids lack long-range order and a distinctive geometry. Their properties are amorphous, making them incomparable to crystalline solids. Because they have no melting point and can be broken or transformed at high temperatures, amorphous solids are often not reused in industrial processes. Listed below are some of the properties of amorphous solids. Read on to find out more about the many uses of amorphous solids.

Molecular solids

A molecular solid is a material consisting of discrete molecules bound together by van der Waals forces, dipole-dipole interactions, and quadrupole interactions. These forces are the strongest types of chemical bonds and are responsible for many of the properties of solids. Molecular solids can be characterized by their high molecular density. If you’re curious about the science behind this type of material, read on to learn more.

Common solid materials

Most solids have two main properties, malleability and ductility. Malleability refers to the solid’s ability to be hammered into a sheet or stretched into a wire. Metals are generally ductile, due to their non-directional metallic bonds. By contrast, ionic and covalent bonds require fixed three-dimensional lattice structures and, as a result, are brittle.


The word “solid” has many meanings. Unlike liquids or gases, solids do not disappear into air. This solid-like quality is the foundation of many definitions. Some examples of solids include: a solid friend who is reliable and trustworthy; a solid performance that was not outstanding; a win with a large but not overwhelming majority; and a bar of solid chocolate, which is all chocolate.


A solid is a physical substance with definite volume and shape. Its constituent particles are tightly packed and its volume cannot change. It is a solid because of these characteristics. Hence, the term solid describes a material that is not a liquid or gas. Despite its name, solids can be classified into three types: liquid, gas, and solid. Moreover, students should be able to describe transitions between these states and what influences them.

Common materials

All solids are made of atoms and molecules. These atoms are held together by strong covalent bonds and weak intermolecular forces. For example, ice is made of H2O(s), whereas table sugar is made of C12H22O11. Each of these molecules interacts with its neighbors in unique ways to form a solid. The atomic arrangement of solids gives them their physical properties.