Unit 3: Development of Atomic Theory — 12 cards
Question / Term
What is the difference between an element and a compound?
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Answer / Definition
Element: a pure substance made of only ONE type of atom (e.g., gold, oxygen). Compound: a pure substance made of two or more elements CHEMICALLY combined in a fixed ratio (e.g., H₂O, NaCl). Both are pure substances; compounds can be broken down chemically, elements cannot.
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