Atom - Smallest unit of matter that retains the properties of an element., Proton - Positively charged subatomic particle., Neutron - A neutral subatomic particle., Electron - Negatively charged subatomic particle., Nucleus - Protons + Neutrons. The center of an atom., Compound - Made up of 2 or more different types of atoms., Molecule - 2 or more atoms that are bonded together., Element - They are made up of one type of atom., Mixture - A combination of 2 or more substances that are not chemically combined. The parts can be separated., Atomic Number - Equals the number of protons, Atomic Mass - Equals the total number of neutrons and protons, Pure Substance - Contains only one type of matter, Charge - Determined by comparing the number of protons to the number of electrons., Where are electrons located? - Outside the nucleus,

Atomic Structure

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