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., Metal - It has a shiny surface, good electrical and heat conductor, Non-metal - Brittle, dull surface, low melting point, Halogen - Group 18 in Periodic Table,

elements compounds mixtures.

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