Elementary particles, a term in physics, refer to the smallest or/and most basic unit of matter that people recognize, and are the basis for all kinds of objects. That is: the smallest volume substance without changing the properties of the substance. It is the basis for all kinds of objects, and it is not a certain substance because of its smallness. But after the quark theory was put forward, people realized that elementary particles also have complicated structures, so the term "elementary particles" is generally not mentioned.
According to different forces, elementary particles are divided into three categories: quarks, leptons and propagators. Under the theoretical framework of quantum field theory, these elementary particles are treated as point particles.
Elementary particles are also an interdisciplinary subject of language philosophy. There are multidisciplinary scientific applications. Scientists use particle accelerators to accelerate some particles, and sometimes use particle collision methods to study the nature and composition of elementary particles.