Quizlet

Flashcards: Chemical Building Blocks

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Matteris anything that has mass and takes up space.
3 principal states of mattersolids, liquids, and gases.
Characteristic propertiesfor a give substance never changes, they can be used to identify unknown matter.
Boiling pointis the temperature at which a substance changes from a liquid to a gas.
Melting pointis the temperature at which a solid changes from a solid to a liquid.
Physical changesalter the form of a substance, but not its identity.
Chemical changesare when substances combine or break apart to form new substances.
Chemical activityis a characteristic property of a substance that indicates its ability to undergo a specific chemical change.
Mattercan be classified into two general categories: mixture and pure substances.
Pure substancesis made of only one kind of matter and has definite properties.
Elementsare substances that cannot be broken down in to other substances by any physical or chemical means.
Compoundis a substance made of two or more elements that are chemically combined.