Topic 1 Matter and Chemical Reactions Vocabulary 1-19

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element

Back

a pure substance that contains one type of atom and cannot be broken down into a simpler substance

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compound

Back

a substance made of two or more chemical elements bonded to each other

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homogeneous mixture

Back

a mixture in which the components are uniformly distributed throughout and where the composition of the mixture is the same throughout

Front

heterogeneous mixture

Back

a mixture in which the components are not uniform and where different samples from the mixture are not identical to each other

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cohesion

Back

the attraction of molecules for other molecules of the same kind

Front

surface tension

Back

the tendency of liquid molecules to attract one another and contract to the smallest possible surface area

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adhesion

Back

the attraction of molecules of one kind for molecules of a different kind

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attraction

Back

a force that draws two objects together or keeps them attached to each other

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acid

Back

compound that is sour and dissolves some metals

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base

Back

compound that has opposite properties to acids, is bitter, and feels slippery