Atom, The smallest partical that can exist on it's own, Element, A substance made up of 1 type of atom, Molecule, 2 or more atoms chemically joined, Compound, Contains 2 or more types of atom chemically joined, Periodic table, A list of elements., Nucleus, The centre of an atom that contains protons and neutrons, Mixture, Two or more substances that can be easily separated by physical methods..

elements compounds mixtures.

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