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Chem Ch. 2 VOCAB

Chapter 2 Vocabulary

QuestionAnswer
law of conservation of mass mass can be neither created nor destroyed in an ordinary chemical or physical process
matter anything that has mass and takes up space
mass the amount of matter an object contains
substance matter that has uniform and definite composition
physical property a quality or condition of a substance that can be observed or measured without changing the substance's composition
solid matter that has a definite shape and volume
liquid matter that flows, has a fixed volume, and takes the shape of its container
gas matter that takes both the shape and volume of is container
vapor the gaseous state of a substance that is generally a liquid or solid at room temperature
physical change a change that alters a given material without changing its composition
mixture physical blend of two or more substances
heterogeneous mixture a mixture that is not uniform in composition; you can tell there is multiple things in the mixture
homogeneous mixture a mixture that has a completely uniform composition; you cannot tell there is multiple things in the mixture
solutions a homogeneous mixture
phase any part of a system with uniform composition and properties
distillation a purification process in which a liquid is evaporated and then condensed again to a liquid;
elements a substance that cannot be changed into simpler substances under normal lab conditions
compounds a substance that can be separated into simpler substances only by chemical reactions
chemical symbol a one or two letter representation of an element
chemical reaction the changing of substances to other substances by the breaking of bonds in reactants and the formation of bonds in products
reactants a starting substance in a chemical reaction
products a substance formed in a chemical reaction
chemical property the ability of a substance to undergo chemical reactions and to form now substances
Created by: aricestrand1
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