Atom - the basic unit of a chemical element, Matter - anything that has mass and volume, Element - a single type of atom, Nucleus - the center of an atom, Proton - a very small, POSITIVELY charged particle located in the nucleus of an atom, Electron - a tiny, NEGATIVELY charged particle located outside of the nucleus of an atom in the electron cloud, Neutron - as small particle with NO CHARGE located in the nucleus of an atom, Atomic Number - the number of protons in the nucleus of an atom, Chemical Symbol - A one or two letters used to represent the name of an element, Phases of Matter - solid, liquid, gas, plasma,

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