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All macroscopic matter is made out of many miniscule particles called atoms.
The study of how these atoms interact is called Chemistry . The three particles that make up atoms are protons, neutrons, and electrons. Protons and neutrons are the heavier particles that reside in the nucleus, the dense center of the atom. Electrons are extremely lightweight and negatively charged particles that exist in the electron cloud that surrounds the atom with a radius 10,000 times greater than the nucleus itself. The nucleus of the atom is the dense center made of an atom's protrons and neutrons.