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Page 1 of the Chemistry Chapter

Elements
Elements are the smallest naturally occurring form of one kind of a chemical.  In other words, they are the purest form of a chemical and do not contain any other substances.  Elements are arranged into the periodic table which helps display chemical relationships between the elements.  Ninety-two elements occur naturally.  The remaining 20 must be artificially created.  Elements are represented by chemical symbols.  These symbols can represent names in English (H for Hydrogen), Latin (Ag for Argentum [silver]), ancient Greek or even be named after a well know person (Es for Einsteinium).