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Chapter 2

Chemistry 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 one of a class of substances that cannot be separated into simpler substances by chemical means.
Compound a pure substance composed of two or more elements whose composition is constant.
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 A solution composed of parts or elements that are all of the same kind.
Heterogeneous Solution A solution composed of parts of different kinds.
Distillation the volatilization or evaporation and subsequent condensation of a liquid.
Physical Changes A change pertaining to the properties of matter and energy other than those peculiar to living matter.
Physical Properties can be observed or measured without changing the composition of matter.
Chemical Changes A change that effects the chemical composition of a substance.
Chemical Properties Can be observed or measured by changing the composition of matter.
Law of Conservation of Matter a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system.
Created by: bpreston16
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