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the smallest particle of an element that can exist on its own (the basic building block of matter).
the forces between atoms within molecules: covalent, polar covalent, dative covalent, ionic and...
a change in which the form of matter is changed, but one substance is not transformed into...
in a chemical reaction no mass is gained or lost when substances react to form new products....
a substance that improves the efficiency of a catalyst is called a promoter.