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Chapter 2 Vocab

TermDefinition
pure substance matter that always has exactly the same composition;an element or compound.
element a substance that cannot be broken down into simpler substance.
atom the smallest particle of an element
compound a substance that is made from two or more simpler substances and can be broken down into those simpler substances
heterogeneous mixture a type of mixture in which the parts of the mixture are noticeably different from one another
homogeneous mixture a typer of mixture in which the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another.
solution a mixture that forms when substances dissolve and form homogeneous
suspension a heterogeneous mixture that separates into layers over time
colloid a mixture that contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension
physical property any characteristic of a material that can be observed or measured without changing the composition of the substances in the material
viscosity the speed and direction an object is moving, measured relative to a reference point
conductivity a material's ability to allow heat or electric charges to flow
malleability the ability of a solid to be hammered without shattering
melting point the temperature at which a substances changes from solid to liquid
boiling point the temperature at which a substance boils; the temperature at which vapor pressure is equal to atmospheric pressure
filtration a process that separates materials based on the size of their particles
distillation a process that separates the substances in a solution based on their boiling points.
physical change a change that occurs when some properties of a material, but the substances in the material stay the same
chemical property any property that produces a change in the composition of matter
flammability a material's ability to burn in the presences of oxygen
reactivity the property that describes how readily a substance combines chemically with other substances
chemical change change that occurs when a substance reacts and forms one or more new substances
Created by: alexis.pastva