Pure Substance - anything composed of a single type of material, Atom - smallest building block of all matter. It is composed of several parts [(proton = + charge) (neutron = no charge)] [nucleus] (electron = - charge), Element - pure substance composed of only ONE type of atom; has specific properties, Compound - two or more elements that are chemically combined; has properties that are different than the individual elements, Periodic Table of Elements - an arrangement of the elements ordered by atomic number and showing periodic properties of the elements,

Element Vocabulary

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