An Atom is the____ part of an ____ that can exist A chemical formula is a formula that shows the ____ present in a ____ and their ____ Chemical properties are features of the way a ____ reacts with other ____ Chemical reactions are a reaction in which a new ____ is formed. In other words ____ are rearranged and ____ Combustion is a ____ reaction where a substance reacts quickly with ____ and gives out ____ and ____, also called ____

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