Subatomic particles, such as protons, neutrons, and electrons, are not made up of smaller particles in the same way that atoms are composed of subatomic particles. Instead, these particles are considered fundamental particles, which means they are not believed to have any internal structure or be composed of smaller components.
According to our current understanding in particle physics, subatomic particles are thought to be elementary particles, meaning they are not composed of anything smaller. These particles are believed to be indivisible and point-like, meaning they do not have any internal structure or substructure. They are considered to be the basic building blocks of matter.
There are several types of elementary particles, including quarks, which are the building blocks of protons and neutrons, and leptons, which include electrons. Additionally, there are force-carrying particles called gauge bosons, such as photons (particles of light) and W and Z bosons (responsible for the weak nuclear force). The Higgs boson is another elementary particle that interacts with other particles and gives them mass.
It's important to note that our understanding of subatomic particles and their fundamental nature continues to evolve as scientific research progresses. New discoveries and theories may provide further insights into the nature of these particles in the future.