Elementary Particles
Elementary particles are subatomic particles that are not composed of smaller particles. They are the building blocks of matter and are classified into two categories: fermions, which include quarks and leptons, and bosons, which include photons and the Higgs boson. These particles interact with each other through the four fundamental forces of nature: gravity, electromagnetism, the weak nuclear force, and the strong nuclear force. Elementary particles play a crucial role in understanding the fundamental laws of physics and the structure of the universe.