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Chapter 2

Chapter 2 vocab

QuestionAnswer
Matter the substance or substances of which any physical object consists or is composed
Pure Substance A sample of matter, either an element or a compound, that consists of only one component with definite physical and chemical properties and a definite composition
Element a substance made up of atoms with the same atomic number
Compound Substances composed of two or more elements which do not vary in composition from sample to sample, and which have fixed and definite physical properties
Mixture A system of two or more distinct chemical substances
Homogeneous Solution Homogeneous mixture of two or more substances.
Heterogeneous Solution A mixture or material consisting of more than one substance.
Distillaion the volatilization or evaporation and subsequent condensation of a liquid, as when water is boiled in a retort and the steam is condensed in a cool receiver
Physical Changes any process involving a substance's change from one state (gas, liquid, solid) to another without alteration of the chemical composition
Physical Properties can be observed or measured without changing the composition of matter.
Chemical Changes any change from one state (gas, liquid, solid) which is accompanied by alteration of the chemical composition; any process in which one or more substances are changed into one or more different substances
Chemical Properties a characteristic of a substance that becomes known during a chemical reaction; also, a characteristic depending on the arrangement of the atoms in the molecule
Law of Conservation of Matter a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system
Created by: tpeck20