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Chapter 2

Matter •that which has mass and occupies space
Pure Substance a chemical substance is a material with a specific chemical composition
Element •chemical element: any of the more than 100 known substances that cannot be separated into simpler substances and that singly or in combination constitute all matter
Compound •consisting of two or more substances or ingredients or elements or parts
Mixture a substance consisting of two or more substances mixed together
Homogeneous Solution a solution is a homogeneous mixture where one substance is dissolved in another
Heterogeneous Solution Particle size distinguishes homogeneous solutions from other heterogeneous mixtures.
Distillation •the process of purifying a liquid by boiling it and condensing its vapors
Physical Changes concept introduced to contrast with the concept of chemical change. A physical change is any change not involving a change in the substance's chemical identity
Physical Properties •A physical property is any measurable property the value of which describes a physical system's state at any given moment in time
Chemical Changes bonds are broken and new bonds are formed between different atoms
Chemical Properties any of a material's properties that becomes evident during a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity
Law of Conservation of Matter •Matter is neither created nor destroyed, but is combined and rearranged in different ways
Created by: aderr