Atom, The smallest particle 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., Atomic number, The number of protons in the nucleus of an atom, Relative atomic mass, The mass of protons and neutrons in the nucleus of an atom, Electrons, Negatively charged particles in an atom with negligible mass, Protons, Positively charged particles found in the nucleus of an atom, Neutrons, Particles found in the nucleus of an atom with no electric charge, Symbol, used to represent elements when written, Formulae, Used to represent molecules when written

elements compounds mixtures.

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