Chapter 1: Atomic structure and the periodic table

1.1- Elements and compounds

-ELEMENT a substance cannot be broken down chemically

-Compound substance contains at least TWO different elements, chemically combined in fixed proportions

-ELEMENTS cannot break down into other substances

-copper (element) burns in oxygen to make copper oxide (compound)

-Chemical reactions make compounds & (often) involve a detectable energy change

-Importance of

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