All macroscopic matter is made out of many tiny 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 have a positive electrical charge, and neutrons have no electrical charge.
Electrons are extremely lightweight and are negatively charged. They exist in a cloud that surrounds the atom. The electron cloud has a radius 10,000 times greater than the nucleus. The nucleus of an atom is made up of protons and neutrons in a cluster. Virtually all the mass of the atom resides in the nucleus.