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George Review 2

QuestionAnswer
matter anything that has mass and occupies space
atom the smallest unit of an element
compound a substance made of more than one element
element a substance made of only one kind of atom
pure substance any matter with a fixed composition throughout
mixture a combination of more than one pure substance
chemical formula gives the symbols and numbers that indicate the amount and type of each element in a compound
chemical property describes the way a substance reacts with other substances
physical property a characteristic of a substance that can be observed or measured.
melting point the point at which a solid becomes a liquid
boiling point the point at which a liquid becomes a gas
density the mass per unit volume D= m/v
physical change a change in a substance that does not produce a new substance
chemical change a change in a substance that does produce a new substance
Created by: jgeorge
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