chapter 2 matter and change
states of matter
chemical reaction
substance
compounds
describing matter
mixtures
elements
laws of conservation of mass
is a physical blend of to two or more components.
the simplest form of matter that has unique set of properties; an element cannot be broken down into simpler substances by chemical means.
a substance that contains two or elements chemically combined in a liked proportion.
in any physical change or chemical reaction, mass is conserved; mass can be neither created or destroyed.
solid
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matter that has a uniform and definite composition; either an element or a compound; also called pure substance.
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a change that produces matter with a different composition than the original matter.
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liquid
gas
a from of matter that has definite shape and volume.
a type of matter that takes both the shape and volume of a container
the particles in a liquid are in close contact with one another, but the arrangement of particles in a liquid is not rigid or orderly.