Atom - The smallest building block of all matter, Element - A substance made up of only 1 type of atom, Molecule - 2 or more atoms chemically joined, Compound - Contains 2 or more different types of atom chemically joined, Periodic table - where all elements are arranged in order, 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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