Atom, The basic unit of matter and defining structure of an element, Neutron, A particle with no electric charge found in the nucleus, Proton, A positively charged particle found in the nucleus that determines the atomic number, Electron, A negatively charged particle that moves around the nucleus in orbitals, Nucleus, The central region of an atom containing protons and neutrons, Electron Shell, The external region of an atom where electrons are in constant motion, Atomic Number, The number of protons in an atom, Mass Number, The total number of protons and neutrons in the nucleus

Atomic Structure Concepts

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