(Blank) cannot be separated by physical or chemical means. Elements are abbreviated with (Blank), which consist of one or two (Blank). Elements are organized on the (Blank) according to their (Blank). Two or more elements chemically combined make up a (Blank). Elements and compounds are called (Blank) substances because they have a unique set of chemical and physical (Blank).
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An element is a pure substance that cannot be separated into simpler substances by chemical or physical means.Elements are abbreviated with SYMBOLS, which consist of one or two LETTERS. Elements are organized on the PERIODIC TABLE according to their ATOMIC ELEMENTS.Two or more elements chemically combined make up a COMPOUND. Elements and compounds are called PURE substances because they have a unique set of chemical and physical PROPERTIES.