What is the small living of unit matter?

The smallest unit of matter is the atom, which consists of protons, neutrons, and electrons. Atoms combine to form molecules, which make up all substances in the universe. Within atoms, subatomic particles like quarks (which make up protons and neutrons) and electrons are even smaller, but atoms are generally considered the fundamental building blocks of matter. Overall, these components interact through various forces to create the diverse materials and structures we observe.