Matter - Anything that has mass and takes up space., Atom - The basic unit of an element. All matter is made up of atoms., Proton - A positively charged subatomic particle located at the center of an atom., Neutron - A subatomic particle with no charge located at the center of an atom., Electron - A subatomic particle of an atom that is negatively charged and orbits the nucleus extremely fast., Nucleus - Protons and neutrons clump together at the center of an atom to form the nucleus of an atom., Periodic Table - A chart of all known elements that scientists reference when working with atoms or molecules., Molecule - Two or more atoms bonded together.,

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