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chapter 2

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 one of a class of substances that cannot be separated into simpler substances by chemical means. See also chart under periodic table
compound composed of two or more parts, elements, or ingredients
mixture an aggregate of two or more substances that are not chemically united and that exist in no fixed proportion to each other
homogeneous solution one substance is dissolved in another
heterogenous solution A heterogeneous mixture would be: salt with sugar (no water), water with gasoline or oil, salt with sand
distillation 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 something that you can physicaly change
physical properties can be observed or measured without changing the composition of matter. Physical properties are used to observe and describe matter.
chemical properties of matter describes its "potential" to undergo some chemical change or reaction by virtue of its composition. What elements, electrons, and bonding are present to give the potential for chemical change.
chemical changes something that can only be changed chemicaly
Law of Conservation of Matter a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system
Created by: kcoons